Category Archives: Friday Weird Sex Blogging

Mating slugs

I know PZ has recently posted a picture and a video of slugs mating. But these pictures were taken here in North Carolina, by blog reader Kris Barstow, who says:

The year was 1999 plus or minus a year, the site was a few miles from Asheboro, NC. I don’t recall the season, but it was warm, and there is definitely a chill there in the cold seasons, so I assume spring or summer. It was about half an hour after sunrise; I was walking my dog. I would occasionally carry my camera “just because …”
I saw these two acting strangely on the surface of the wooden shed. They actually attached themselves, then went into freefall. They twined around each other, and then a moist pouch was extruded below them. White froth was present but in moderation.
I don’t recall what exactly happened after that. They remained suspended for some time, and the likeliest thing is that I left them to their passion.

SlugLove1.jpgSlogLove2.jpgSlugLove3.jpgSlugLove4.jpg
So, can someone identify the species?

Friday Weird Sex Blogging – Postscript to Pittendrigh’s Pet Project – Phototaxis, Photoperiodism and Precise Projectile Parabolas of Pilobolus on Pasture Poop

Postscript to Pittendrigh's Pet Project - Phototaxis, Photoperiodism and Precise Projectile Parabolas of Pilobolus on Pasture PoopWe have recently covered interesting reproductive adaptations in mammals, birds, insects, flatworms, plants and protists. For the time being (until I lose inspiration) I’ll try to leave cephalopod sex to the experts and the pretty flower sex to the chimp crew.
In the meantime, I want to cover another Kingdom – the mysterious world of Fungi. And what follows is not just a cute example of a wonderfully evolved reproductive strategy, and not just a way to couple together my two passions – clocks and sex – but also (at the very end), an opportunity to post some of my own hypotheses online.

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Friday Weird Sex Blogging – Sex On The (Dreaming) Brain

Sex On The (Dreaming) Brain (First posted on February 5, 2007) Last week I asked if you would be interested in my take on this paper, since it is in Serbian (and one commenter said Yes, so here it is – I am easy to persuade):

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Friday Weird Sex Blogging – Ladybugs

[First posted here] Since I already posted, earlier in the week, the weirdest and most disgusting animal sex post ever, instead of writing a new one, I’ll just send you to see some cute ladybug sex (scroll down to the middle of the post), which also reminded me of these pictures I discovered a few months ago. Or another one, picked up randomly on the web:
ladybug%20sex.jpg

Friday Weird Sex Blogging – The Giant Stinkin’ Phallus!

{First posted here]. Well, this Friday Weird Sex Blogging is not going to be so unique. After all, Janet and Zuzu have already blogged about it, but who can resist a phallic-looking, rotten-meat smelling, fly-attracting flower! And it is not a B-grade movie on the sci-fi channel. This is real! The Titan Arum (Amorphophallus titanum), in all its 3m tall glory is about to start stinking up the greenhouse at the Brooklyn Botanical Garden (follow the flowering on the blog or watch the flowering web-cam here) :

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Friday Weird Sex Blogging – Losing Your Head For Love

As always, animal porn is under the fold (first posted here):

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Friday Weird Sex Blogging – Penis Fencing

Penis_fencing_insemination.jpgSome flatworms, for instance these pretty Pseudobiceros hancockanus, engage in penis fencing. Both individuals are hermaphrodites, i.e., have both male and female organs. The penis is white, pointed and two-headed. Both individuals are trying to inseminate the other. The one who is inseminated has to bear and lay eggs – a more expensive proposition. The one who “won” the fencing bout and did the insemination can move on and fence some other guys and on and on, “fathering” many progeny until happenning onto a better fencer, getting inseminated, and spending the rest of the life as “mother”.

Friday Weird Sex Blogging – The Birds Do It….

Friday Weird Sex Blogging - The Birds Do It....You should check out all of my SiBlings’ Friday Blogging practices, then come back here for a new edition of Friday Weird Sex Blogging. Last week you saw an example of a corkscrew penis. But that is not the only one of a kind. See more under the fold (first posted on July 14, 2006)…

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Friday Weird Sex Blogging – Cooling The Balls

Friday Weird Sex Blogging - Cooling The BallsWhat?….

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Friday Weird Sex Blogging – Corkscrewing

Friday Weird Sex Blogging - CorkscrewingYou really think I am going to put this above the fold? No way – you have to click (First posted on July 7, 2006):

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Friday Weird Sex Blogging – Deepest Lovin’

Friday Weird Sex Blogging - Deepest Lovin'According to the referrers pages of my Sitemeter, a lot of you are excited by strange penises, strange penises, strange penises and strange penises (or something like it). So, today we have to move to a different topic, traffic-be-damned, for those without phallic fixations. So, read on (first posted on July 21, 2006)….

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Sex, Gender, Reproduction

I have not done a Friday Weird Sex Blogging post in ages, and I won’t do today either, but others did some cool blogging on various related topics: from gender disparities, to gynecological procedures, to weird animal/plant sex, so here is a little collection for this weekend:
My take on Mr. Tierney’s article:

Again, I can’t predict what the gender breakdown of any profession would be if we didn’t live in a rather patriarchal society. Maybe it wouldn’t be 50/50 if everything else was equal. But it’s not. I hate to use the P-word, but consider the environment our girls are being raised in. Until societal pressures can really be controlled for, I’m not sure that we can really say what people’s “natural tendencies” are. And that goes for men, too. Gender stereotypes are stupid. And Tierney’s insistence that girls just don’t like some things isn’t terribly inspiring (or new).

Blogging my mammogram:

At the urging of my colleague Abel, who liveblogged his own vasectomy, I’m documenting my first mammogram. Given that I had pretty much no idea what to expect going into this, I’m hopeful that this post will demystify the experience a little for those who know they probably should get mammograms but have been putting it off.

The pros and cons of screening mammography: reading my ‘patient instructions’:

However, to the extent that most of us who are getting regular health care in the U.S. are doing it within the context of some kind of insurance, we aren’t generally making this call individually. We’re working within the framework of our health care provider’s policy, which usually tracks what insurance will cover.

Why Not? Blogging My D & C:

And that’s it! Now I am officially one of those people who shares every intimate detail of their lives with total strangers on the internet. You know, just like I promised myself I would never do. If you had asked me, when I first took up blogging, whether I’d be posting pictures of the inside of my uterus on my blog, I’m pretty sure I’d have answered “what the hell are you talking about?” And yet, here we are. Just don’t tell my mom.

World Wide Web Abortions:

In theory, I think it’s pathetic (not to mention potentially high-risk) that some patients have to resort to DIY specialized medical care just because they happen to be pregnant. In practice, when your reality is that your access to proper medical care is at the mercy of strangers, it’s preferable to obtain care from (apparently) competent strangers like Women on Web, rather than some unqualified black marketeer.

Sex and the over seventies – what the research really said:

Media coverage has stuck to this, although a lot of coverage has focused on the ooo-isn’t-it-shocking-that-wrinklies-are-having-sex angle, and in many places misquoting or misunderstanding the study data. This is probably because most journalists didn’t read the original research or editorial, and based their stories on the press release. Of the journalists I spoke to who were writing their coverage yesterday the majority were not interested in getting reportage of the study right, but simply wanted me to find them a seventy year old couple who didn’t mind talking about their sex lives or having their photograph included in the paper.

Lonesome George not so lonesome:

George, a Pinta island tortoise who has shown little interest in reproducing during 36 years in captivity, stunned his keepers by mating with one of his two female companions of a similar species of Galapagos tortoise.

This Friday’s Weird Science: Foot-binding:

This is where Dr. McGeoch got his idea. He notes that ancient Chinese historians who lived during the Tang Dynasty talked about women with their feet bound, noting that they were, perhaps, a little more “sensitive” in bed than those who had big feet. So foot binding was considered conducive to a better sex life. Dr. McGeoch hypothesizes that, because the girl’s feet were kept small, broken, and atrophied, she might get a structural reorganization in her somatosensory cortex, where neurons were recruited from the feet to the genetalia, resulting in a stronger signal from the genitals. Of course, this would remain to be seen (and I would not want to be the lab rat for that experiment), but it’s an interesting idea.

Not quite viagra!:

…It’s a penis shaped fungus! A Stinkhorn in the family Phallaceae. I came across this in a unit about fungi I did last year and just found it funny… a bit immature perhaps…

Friday Weird Sex Blogging – Corkscrewing

Friday Weird Sex Blogging - CorkscrewingYou really think I am going to put this above the fold? No way – you have to click (First posted on July 7, 2006):

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The Dangers of Blogging, or, the Quest for Male Contraception

dice.jpg“Why isn’t there a birth control pill for men?” is the latest “Ask A ScienceBlogger” question. I am sure my SciBlings will rise to the occasion and explain both the biological and social barriers to the development, production and marketing of such a pill. I will be more light hearted, with a brief look at alternative methods proposed over the years intended to make guys temporarily infertile. Let’s start with this delightful, funny, yet informative, movie:

The movie can be found here, via Science of the Invisible (Thanks for the heads-up).
Perhaps this quack had a point after all! Would you mind getting mildly electrocuted so you could have unprotected sex for a while?
One of the factors often invoked to explain the decrease in male fertility in the developed world is the fashion of wearing tight jeans (didn’t work for me – look at my kids!), which increases the temperature in the scrotal region. Perhaps we can learn from the dolphins and devise ways to do exactly the opposite: kill sperm by heating the testes. People have actually tried this, sitting in hot baths for hours every day, with some anecdotal success.
Or we can infect men with norovirus. There is no way they will have sex at all if they are spending their time in the bathroom, trying to make the tough decision of which way to turn when projectile ejection of liquid is happening simultaneously at both the cranial and the caudal ends of the body.
Finally, going to the chemicals, there is an unwanted side-effect of some anti-depressants: Though there’s no problem with getting an erection (for hours!), they make it almost impossible to achieve orgasm or ejaculation. Perhaps we can study the underlying mechanism of this effect and devise a complex time-release pill that would work sort-of like this: first, Viagra gets into the system, ensuring erection; then, the drug mimicking the effects of anti-depressants kicks in blocking ejaculation; and finally, after a prescribed time, an anti-Viagra compound is released, effectively ending the show with no damage done.
What do you think, would guys go for it?
Or should they (as the movie above suggests) just blog around the clock?

Run for Cover – a Four-Headed Penis!

If it was Friday and if I still had the time, energy and inspiration for Friday Weird Sex Blogging, I would definitely write something snarky about this latest study – of a four-headed penis of the Echidna. But the topic fits nicely into the Halloween theme if things like these scare you ­čśë
In short, the spiny anteater, a Monotreme (an egg-laying mammal living in the Australian bush), has four heads on its penis. Two of those are functional and these two are used alternately, i.e., one ejaculation through the left one, the next through the right one and so on. Dr.Joan produces the Quote Of The Day (perhaps too racy for the Front Page of scienceblogs.com):

“…there’s nothing more uplifting that a four-headed phallus on a Monday afternoon…”

Mo gives more details of the science, including the NSFW video clip…
This is why science blogging is so much fun….

Friday Weird Sex Blogging!?

On some Fridays, I write about strange reproductive strategies and mating habits of various organisms, sometimes in excrutiating detail, though I have not done it very regularly lately (see the Friday Weird Sex Blogging archives).
But some people just collect them all in one place, in one post full of strangeness. You can read about 30 Strangest Animal Mating Habits on Neatorama. Or 11 Examples of Unusual Mating Habits on Canongate (both via Liberals in Exile).
Others have a regular feature on science and nature of sex, e.g., Insect Sex on What’s That Bug, the Sexy Beast category on the Primordial Blog and the Friday Flower Porn on Dr.Joan Bushwell’s Chimpanzee Refuge.
And there are sites and blogs entirely dedicated to the science of sex, ranging from scandalous, like The Illustrated Book of Sexual Records, through funny yet informative, like Secret Sex Lives of Animals and Physics of Sex, all the way to the “serious” stuff, e.g., Dr.Petra Boynton’s sexology blog and The Well-Timed Period (human reproductive physiology, health and associated politics).
How can one possibly compete in such a crowded field?

Monday Weird Sex Blogging….

…because weird sex does not only happen on Fridays….
Remember this? Many have asked themselves (I did) where does it go, i.e., what kind of female genital tract can accomodate such a large penis. But one person actually did not stop at wondering but set out to find out. You can find out who and how and why in Carl Zimmer’s today’s NYTimes article about today’s PLoS-One paper.

Friday Weird Sex Blogging – a cop-out again, and 15 minutes late…

I was in the middle of writing a serious review of a paper meant for Friday Weird Sex Blogging, when reading this paralized me (hopefully only transiently and I will finish it by next week).
So, when in trouble, I can always go back to Physics Of Sex and see if Buzz has someting new up. And he does.
Is the Select Comfort air mattress good for sex? To answer that question, a good scientist performs an experiment.
The Brownian motion of bar-hopping is something you need to know about if you are single and on the dating scene (thank FSM I am not, and hopefully never will have to be again).
And this book seems to be for the true connoisseur, though I am interested to know more details about the purported adaptive function of female orgasm. Ill just have to put it on my wish list for now, until I can afford to buy it.

I Dream Of Jeannie

Comparative analysis of sexual dreams of male and female students (PDF)

The subject of research is analysis of connection between sexuality as instinctive function and dreams with sexual content as cognitive function. The sample consisted of 656 students, 245 males and 411 females. Research showed significant difference between genders concerning sexual dreams their appearance, frequency, image of sexual partner, and content subjective emotional experience during dreams and talk about sexual fantasies. Based on the obtained data, the authors believe that dreams with sexual content are not learned behavior, but biologically determined sexual behavior, and that cognitive elaboration of contents and objects of sexual fantasies is secondarily environmentally conditioned.

The article is in Serbian language, published in the journal ‘Psihijatrija danas’ (2000, Vol. 32, No. 4, pp. 227-242) by Stankovi─ç Miodrag, Zdravkovi─ç Jezdimir A., and Trajanovi─ç Ljiljana (all from Klinika za za┼ítitu mentalnog zdravlja i neuropsihijatriju razvojnog doba Klini─Źkog centra, Ni┼í).
If you are interested I’ll take a look and translate important parts to quote and see if it is any good.

Sleep Number Bed?

Adjust your sleep number for the best performance! Or, what does your sleep number say about your performance?

Friday Weird Sex Blogging – Sensory Neuroscience

In a time-crunch like this, one can always count on Buzz Skyline to save the day…..

Friday Weird Sex Blogging – more on fluid mechanics and Viagra

I’ve been lazy over the holidays with my blogging, so I’ll defer, once again, to Physics Of Sex blog:
Part 2 of Pumped Up and Ready for Love: Sex and Fluid Physics
And once the flow gets going, you may want to make sure that your toys are ethical.

Friday Weird Sex Blogging

Teaching circulatory physiology is pretty much the same as teaching fluid physics. It can get a bit tough and boring. But, if it is taught like this, I bet ther would be no students sleeping in the back row and failing the tests….

Physics of Oscillations and the Choice of the Just-Right Bed Mattress

This does not have much to do with circadian oscillations, or even the daily rhythms of human mating, but a much faster rhythm of human mating – you know what I’m talking about…
The fascinating new blog, The Physics of Sex, explains the physics in great detail and gives you ideas for your own home science experiments.

Looking for a present for a budding entomologist?

I mean, er, an entomologist with a keen interest in insect sex? If so, you can buy this cool poster (pdf). More info on the poster is here. Shopping info is here.

Friday Weird Sex Blogging

As seen on Facebook (I could not find the originals anywhere online – if you do, please let me know so I can attribute it correctly):
a1%20fish%20loveeee.jpg
a2%20pregnant%20fisheyyyy.jpg
a3%20big%20happy%20fish%20family.jpg

“Boy, this is going to be hard…”

…and it will stay hard for another 4 hours.
[That is Friday Weird Sex Blogging for this week….]

Friday Weird Sex Blogging – Ladybugs

Since I already posted, earlier in the week, the weirdest and most disgusting animal sex post ever, instead of writing a new one, I’ll just send you to see some cute ladybug sex (scroll down to the middle of the post), which also reminded me of these pictures I dicovered a few months ago. Or another one, picked up randomly on the web:
ladybug%20sex.jpg

Friday Weird Sex Blogging – Cooling The Balls

What?….

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Friday Weird Sex Blogging – I’ve Been Defeated

I had several ideas for today’s edition that I thought were really great, until I saw this. There is nothing I can write today that can get any better. I know when I am outcompeted and I bow to His Tentacled Majesty. I’ll try something better next week….

Friday Weird Sex Blogging – The Giant Stinkin’ Phallus!

Well, this Friday Weird Sex Blogging is not going to be so unique. After all, Janet and Zuzu have already blogged about it, but who can resist a phallic-looking, rotten-meat smelling, fly-attracting flower! And it is not a B-grade movie on the sci-fi channel. This is real! The Titan Arum (Amorphophallus titanum), in all its 3m tall glory is about to start stinking up the greenhouse at the Brooklyn Botanical Garden (follow the flowering on the blog or watch the flowering web-cam here) :

Continue reading

Postscript to Pittendrigh’s Pet Project – Phototaxis, Photoperiodism and Precise Projectile Parabolas of Pilobolus on Pasture Poop

We have recently covered interesting reproductive adaptations in mammals, birds, insects, flatworms, plants and protists. For the time being (until I lose inspiration) I’ll try to leave cephalopod sex to the experts and the pretty flower sex to the chimp crew.
In the meantime, I want to cover another Kingdom – the mysterious world of Fungi. And what follows is not just a cute example of a wonderfully evolved reproductive strategy, and not just a way to couple together my two passions – clocks and sex – but also (at the very end), an opportunity to post some of my own hypotheses online.

Continue reading

Friday Weird Sex Blogging – Losing Your Head For Love

As always, animal porn is under the fold:

Continue reading

Friday Weird Sex Blogging – Deepest Lovin’

According to the referrers pages of my Sitemeter, a lot of you are excited by strange penises, strange penises, strange penises and strange penises (or something like it). So, today we have to move to a different topic, traffic-be-damned, for those without phallic fixations. So, read on….

Continue reading

Friday Weird Sex Blogging – The Birds Do It….

You should check out all of my SiBlings’ Friday Blogging practices, then come back here for a new edition of Friday Weird Sex Blogging. Last week you saw an example of a corkscrew penis. But that is not the only one of a kind. See more under the fold…

Continue reading

Friday Weird Sex Blogging – Corkscrewing

You really think I am going to put this above the fold? No way – you have to click:

Continue reading

Friday Weird Sex Blogging – Penis Fencing

Penis_fencing_insemination.jpgSome flatworms, for instance these pretty Pseudobiceros hancockanus, engage in penis fencing. Both individuals are hermaphrodites, i.e., have both male and female organs. The penis is white, pointed and two-headed. Both individuals are trying to inseminate the other. The one who is inseminated has to bear and lay eggs – a more expensive proposition. The one who “won” the fencing bout and did the insemination can move on and fence some other guys and on and on, “fathering” many progeny until happenning onto a better fencer, getting inseminated, and spending the rest of the life as “mother”.

Friday Weird Sex Blogging

There is a tradition in the blogosphere of posting something light on Fridays.
Some people do the Friday Random Ten, but I do not have an iPod, and keep my computer on Mute, so I do not listen to music or can generated a random ten.
Most people post pictures of variousanimals, mostly cats, but I do not like doing what everyone else is doing. And once I’ve posted pictures of my cats (and I did, a couple of times, though never on a Friday), what’s the point of doing it again?
Some people got away from cats and pets and post pictures of cooler animals, like ants, or, well, ants. birds. Or birs on Monday. Or nudibranchs. Or cephalopods. Or plants. Or invasive species.
Some are moving away from living stuff altogether, with Friday Fractals or Organic People Chemistry or Sunday mineral blogging.
Update: Arrrrgh! How could I have forgotten
Friday Sprog Blogging and Map The Campus!
What can I do? How about something that is sure to bring in Google searchers?
Sex!
That’s it. Every Friday, I’ll try to find an example of some cool organism involved in a strange reproductive practice. Today is the first such Friday. Enjoy….

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