10 Weird Things That Happen To Your Body During S*x

Your girls go through changes

The next time you’re getting busy, take a second to check out your chest. As a result of increased blood flow to the area, you’ll probably notice that your nipplés are eréct and a little darker in color than usual. Plus, previous research shows that some women’s bréasts swell during arousal and can actually increase in size.

Your body starts blushing

Studies show that your facial and body temperature increases during séxual arousal, which explains why your face and chest might get a little red when you’re having séx. Plus the increased blood flow and heart rate causes a “séx flush” in some people, which appears as a red or pinkish rash on your chest that goes away after arousal subsides.

Your mind chills out

If it seems like your brain turns to mush during an órgasm, you’re kind of right. The amygdala, the part of the brain involved in fear and anxiety, essentially shuts down when women have an órgasm, according to a study from the University of Groningen in the Netherlands. Even the body movements you make during órgasm are totally unconscious, according to brain scans.

Your muscles have a mind of their own

During órgasm, your body experiences a period of myotonia–or muscle spasms–due to the activation of the vagínal muscles, according to studies by pioneering séx researchers William Masters and Virginia Johnson. This causes the muscles in your legs, arm, neck, abdomen, and face to tense up. At the same time, involuntary vagínal contractions happen at regular intervals. Researchers still aren’t sure why these spasms occur and why some women don’t experience them at all.

Your bladder goes on hold

When you órgasm, your body releases an antidiuretic hormone, which is why you may not be able to pee right after séx, says Herbenick. Just don’t put off hitting the bathroom too long–experts advise going after séx to help prevent UTIs.