These Sea Slugs Penetrate Each Other In The Head During Sex

If you’re an aficionado of sea slugs, you’re probably used to weird and cringe-worthy sex acts. When two of these hermaphrodite animals penetrate each other at the same time like an R-rated yin-yan…

Garry Rogers:  Unique?  I couldn’t ignore this bit about coitus cephalus.

See on phenomena.nationalgeographic.com