CAPTURED! What happens to your body during sexual intercourse

A lot has been said about what happens to certain parts of the body during sexual intercourse. Some of them include a claim by Robert Latou Dickinson in 1933 that the penis formed an S shape when inside a female during sex.

Another is that the volume of the uterus increases during sexual arousal, as proposed by William Master and Virginia Johnson in 1964.

Now doctors have used Magnetic Resonance Imaging (MRI) scanner to address those claims. The scanners which help doctors to see how our bodies function in unprecedented ways, have now been used to learn more about sex and intimate body movements like kissing.

The scanner captured a couple’s French kiss and another’s sex in missionary style.

The result reveals the movement of the tongues as they enter the other person’s mouth, as well as the heart rates of both members increasing throughout.

The team of researchers concluded: “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".

The scanner images, from which a Vox video was created, also mirrored what happens during swallowing, talking in different languages, playing the trumpet, and defecating.