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7rl5p TIL during sexual arousal for men, muscles at the base of the bladder contract in order to close off the passageway from the bladder into the urethra, thus making it impossible for urine to be released during ejaculation.
yBA8 TIL that gagging when we see someone else vomiting is actually an evolved trait among primates. Humans would forage for food in groups. If any member of the group had an adverse reaction due to toxins in the food, it would be advantageous for the other members to take it out of their system too.
vRb7 TIL that when cooking in a cast iron skillet, the ammount of iron in the food may increase by 850 percent.