Erex's Useless facts thread

[Erex]

The reason why your nose gets runny when you are crying is because the tears from the eyes drain into the nose. According to the Museum of Sex, the vibrator was originally used as a medicinal treatment for female "hysteria" during the 19th century. The vibrator-induced orgasms helped doctors dissipate hysteria's anxiety-related symptoms. Semen contains zinc and calcium, both of which are proven to prevent tooth decay.