Mosquitoes don't just bite you, they also pee on you.
11
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
Condoms were originally made of animal intestines or linen.
347
Some Chinese-made hair bands were fashioned from recycled condoms.
131