MRIs Are For Lovers Follow-Up: Da Vinci Was Wrong

An earlier post looked at a 1999 Dutch study in which couples had sex while an MRI scanner looked on. It turns out that Wired News editor and blogger Kristen Philipkoski wrote a story about the research back then. Here’s an excerpt: [The study revealed] evidence that the uterus was not enlarged during intercourse — […]

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An earlier post looked at a 1999 Dutch study in which couples had sex while an MRI scanner looked on.

It turns out that Wired News editor and blogger Kristen Philipkoski wrote a story about the research back then.

Here's an excerpt:

[The study revealed] evidence that the uterus was not enlarged during intercourse -- a finding contrary to research Masters and Johnson reported in their 1966 book Human Sexual Response. The Dutch researchers found that although the uterus was raised and the anterior vaginal wall was lengthened, the uterus remained the same size…

The latest research also refutes Leonardo Da Vinci's "The Copulation," from 1493, which portrays a straight penis during intercourse, and another by R. L. Dickinson, who drew the penis in an S-shape during copulation in 1933.

The images found that the penis is actually shaped like a boomerang during missionary-style sex. This phenomenon occurred in each experiment regardless of the depth of penetration.

Here's another look at "The Copulation" by a doctor who points out that DaVinci reflected ideas of the time about how urine and semen were separated into two tubes (the church apparenlty thought urine was "polluting") and how semen came from the spinal cord.

How 'Doing It' Is Done [Wired News]