Friday Weird Sex Blogging
clock | May 6, 2009I 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…
clock | April 10, 2009We 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.…
clock | April 10, 2009 (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):
Stankovic Miodrag, Zdravkovic Jezdimir A., and Trajanovic Ljiljana,
Comparative analysis of sexual dreams of male and female students (PDF). Psihijatrija danas 2000, Vol. 32, No. 4, pp. 227-242
Here is the English-language Abstract:
The subject of research is analysis of connection between sexuality as instinctive function and dreams with sexual content as cognitive function. The sample consisted…
clock | April 10, 2009[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:
clock | April 10, 2009{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) :
clock | April 10, 2009As always, animal porn is under the fold (first posted here):
You have probably heard that a female praying mantis eats her mate's head during the mating process. You may imagine the process to go something like this:
Actually, there are many species of praying mantises and in most of them sexual cannibalism is quite rare. It occurs much more often in the laboratory than out in the field. Apparently, the lights and sounds of a laboratory are stressful to the female so she acts aggressively in response.
The praying mantises are very aggressive predators and they can eat quite a lot of…
clock | April 10, 2009Some 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 "…
clock | April 10, 2009You 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)...
Some birds also have spiral tools. For instance, see this 20-cm penis of an Argentine lake duck (Oxyura vittata) (from this paper: The 20-cm Spiny Penis of the Argentine Lake Duck (Oxyura vittata) (pdf)):
The same author, Dr Kevin McCracken of the University of Alaska, Fairbanks, later found an even longer…
clock | April 10, 2009What?....
There is a slang phrase in Serbo-Croatian that means "doing nothing; being idle; wasting time", and it is "hladiti jaja", which means "cooling (one's) balls". So, if you see a guy just sitting there, clutching a beer bottle and gazing into the distance, you may ask him "Hey, man, whatcha doin'?" and he may reply " 'ladim jaja", i.e., "I'm coolin' me balls".
Well, this slang phrase, indicating a thermoregulatory behavior, has its origin in the real theromoregulatory physiology. Yes, mammals have to cool their balls. That is why mammalian testes are located outside the body inside…
clock | April 10, 2009You really think I am going to put this above the fold? No way - you have to click (First posted on July 7, 2006):
Today's lesson is on the reproductive anatomy of the domestic pig (Sus scrofa domestica), which probably applies to the wild species in the pig family as well. Although we may reflexively think about invertebrates when pondering diversity of copulatory organs, mammals are not too bad in that department either. After all, the sperm is delivered in some species into the vagina (e.g., dog), in others into the cervix (e.g., pig) and in yet others into the uterus (e.g., horse), so…
clock | April 10, 2009According 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)....
If science is all you care for you can skip to the bottom of the post because the main character of today's story will be introduced with a poem (also found here):
The Conjugation of the Paramecium
by Muriel Rukeyser
This has nothing
to do with
propagating
The species
is…
clock | July 25, 2008I 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.…
clock | May 5, 2008You really think I am going to put this above the fold? No way - you have to click (First posted on July 7, 2006):
Today's lesson is on the reproductive anatomy of the domestic pig (Sus scrofa domestica), which probably applies to the wild species in the pig family as well. Although we may reflexively think about invertebrates when pondering diversity of copulatory organs, mammals are not too bad in that department either. After all, the sperm is delivered in some species into the vagina (e.g., dog), in others into the cervix (e.g., pig) and in yet others into the uterus (e.g., horse), so…
clock | January 10, 2008"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…
clock | October 30, 2007If 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 ;-)
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…
clock | June 8, 2007On 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…
clock | May 1, 2007...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.
clock | February 2, 2007I 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…
clock | January 26, 2007Comparative 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…
clock | January 22, 2007Adjust your sleep number for the best performance! Or, what does your sleep number say about your performance?