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MRI of coitus and semi-identical twins

Just two interesting articles from the past day. After so many serious posts, this one is about real popular medicine. I hope you’ll like it.

What started as artistic and scientific curiosity has now been realised. We have shown that magnetic resonance images of the female sexual response and the male and female genitals during coitus are feasible and beautiful; that the penis during intercourse in the “missionary position” has the shape of a boomerang and not of an S as drawn by Dickinson; and that, in contrast to the findings of Masters and Johnson, there was no evidence of an increase in the volume of the uterus during sexual arousal. (Images: Courtesy of

It’s really unbelievable what people are writing about these days.



Researchers have discovered a pair of twins who are identical through their mother’s side, but share only half their genes on their father’s side… Genetic tests revealed that each twin contained some ‘female’ cells with two X chromosomes, and some ‘male’ cells with an X and a Y. The proportion of each type varies from tissue to tissue in each twin, the researchers report in Human Genetics.

3 Comments Post a comment
  1. Alex #

    As far as I know the authors of the”MRI of…” publication won Ig Nobel in Medicine Prize in 2002.

    March 28, 2007
  2. Attis #

    Ever considered having sex inside an MRI? Feeling in heaven while knowing that the spins of your nuclei are also having fun too? If there would be an experiment like this, I’d be in!

    Some time ago I wondered if there have been EEG and PET experiments conducted to examine orgasm in males and females. One such article revealed, if I remember well, that in both sexes, orgasm is associated with a decrease of cortical activity.

    Now that actually makes sense if you ever tried laughing gas.

    March 29, 2007
  3. Wow, I’ve always been a great fan of imaging… this is really funny :-) Ig Nobel in 2000 well-deserved.

    I was just wondering how they did it…. as you have to be motionless while the images are taken. Here is the description from the article:

    “After a preliminary image for positioning the true pelvis of the woman was taken, the first image was taken with her lying on her back (image 1). Then the male was asked to climb into the tube and begin face to face coitus in the superior position (image 2). After this shot—successful or not—the man was asked to leave the tube and the woman was asked to stimulate her clitoris manually and to inform the researchers by intercom when she had reached the preorgasmic stage. Then she stopped the autostimulation for a third image (image 3). After that image was taken the woman restarted the stimulation to achieve an orgasm. Twenty minutes after the orgasm, the fourth image was taken (image 4). At the end of the experiment, the images were evaluated in the presence of the participants.”

    Hmm, I don’t know… not much of a turn-on… unless you love big noisy machines…

    May 20, 2007

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