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TIL that Penis Captivus is a rare occurrence in intercourse when the muscles in the vagina clamp down on the penis much more firmly than usual (a form of vaginismus), making it impossible for the penis to withdraw from the vagina.

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a8pWA TIL A man named Charles Osborne had hiccups non-stop for approximately 68 years, from 1922 to 1990. In 1922, he was weighing a hog for slaughter. He fell and busted a blood vessel in his brain resulting in him damaging a small part of the brain that inhibits the hiccup response.
mmJv TIL: There’s a lizard whose mating behavior follows a Rock-Paper-Scissors evolutionary strategy. Males have 1 of 3 throat colors where orange beats blue, blue beats yellow, and yellow beats orange. For 4-5 years, one strategy dominates, after which the strategy that exploits its weakness takes over.
7rneL TIL that during the Rwandan Genocide in 1994, some people paid to be killed by a bullet, rather than the usual machete or club.
4j5 TIL that strawberries aren’t actually berries, but bananas, avocados, pumpkins and watermelons are.
1alwd TIL the animated Teenage Mutant Ninja Turtles series had to be heavily censored in the UK due to controversy over "Ninja" weapons and the the catch phrase "Bummer" being slang for anal sex.