Here's another reason to stay a virgin , beyond the fact that it's not entirely your choice:. Although very, very rare, it is apparently real. As the woman spasms with an orgasm, the vaginal muscles clamp up. They seize. And they won't release. And your junk gets wedged inside, like a thumb in a Chinese finger trap.

2 years for the price of 1 - save 57%!
Watch Next
Penis captivus allegedly occurs when a penis becomes stuck in a vagina during sexual intercourse. Reports of this happening are incredibly rare. Very few reports have documented the existence of penis captivus. What reports there are have led many people to question whether it really happens. The penis becoming stuck in the vagina is one possible outcome of a condition called vaginismus , in which the vagina involuntarily closes due to muscle spasms in the pelvic floor.
What to Read Next
And they may never report the incident to a doctor. Keep reading to learn more. For penis captivus to occur, a series of events during sex must take place. The penis, which fills with blood during an erection, may continue to grow in size before orgasm. The muscles inside the vagina may pulse slightly during an orgasm, too. On occasion, the vaginal muscles may contract more than typical. These contractions can narrow the vaginal opening. After orgasm, the vaginal muscles will begin to relax. If the man also reaches orgasm, the blood will begin to drain from his penis, and the erection will ease. You may be able to remove the penis from the vagina as these events occur.
Over the weekend, we told you about an Italian couple who reportedly started having sex in the Mediterranean Sea and finished in the ER, because their genitals wouldn't disunite. It sounds outlandish -- hell, we can barely figure out the physics of intercourse in the bathtub -- but there's an actual medical explanation for it. And the basic concept is pretty much this:. It's caused by a vaginal spasm, and apparently in the Italian couple's case, the water added a significant increase in suction. We asked Dr. Yvonne Fulbright -- formerly Astroglide's go-to sexologist, who now has her own line of products -- to pull us in and grip us with her knowledge People feared that the penis could get 'sucked into' the vagina during the missionary position, possibly forever. Apparently, a handful of couples have gotten locked inseparably during sexual intercourse. This is actually pretty common [between] dogs. Unless you're a dog, it's unlikely you'll ever experience this -- you have a better chance of winning the lottery -- but just in case, here's some advice