The local gay weekly had an article on Masturbation Month and included some fast facts:

-Animals observed jerking off in captivity include chimps and bonobos, our closest relatives, as well as dolphins and porcupines
-Elephants have been observed using their trunks to get off (I AM JEALOUS!)
-Vibrators were originally invented to treat hysteria
-According to ancient Greek myth, the god Hermes invented masturbation