You're probably aware some animals have penis bones right? They're called bacculum. But did you know the acronym to remember which animals have them is PPRICC?
Primates (humans are an exception), Pinnipedia (seals), Rodentia, Insectivora (they renamed this group recently to Eulipotyphla, it's shrews and moles), Chiroptera (bats), and Carnivora.
Do with this information what you will.
















