A banana slug can be 6-8 inches and their erect penis can be just as long. Also, their penises emerge from their heads. After sex, banana slugs eat each others penises.
17
Cockroaches can live for 9 days after their head has been cut off.
140
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
Sniffologists have the job of sniffing armpits.
4
The chlorine smell in swimming pools is accentuated by the chemical's reaction with impurities (like poop.)
7