5. The largest erect penis on record is 13½ inches looooooong.
This monster belongs to a New Yorker named Jonah Falcon. Because his Falcon is 9½ inches when flaccid, he's been frisked by airport security thinking his penis was a weapon.
11. Along with being the most venomous spider in the world, the venom found in the Brazilian wandering spider can cause a "persistent and usually painful erection" in men.
However, scientists have discovered that the venom could be used to combat erectile dysfunction in any man within 20 minutes.