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
Condoms were originally made of animal intestines or linen.
347
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82
An Indian man known as "Snake Manu" can put small snakes, including deadly cobras, into his mouth and pass them out through his nose.
59