There is a species of slug (Limax maximus) that fuck by sword fighting each other using their barbed slug cocks, all while hanging from a singular strand of mucus where death below awaits them. Often after fucking, one of them chews the dick off the other in order to get unstuck because either one or both penises have succeeded in stabbing the other to inject their semen.

Many species of mantis and arachnids (Dolomedes tenebrosus) have the enormous females eat the males alive while they are still copulating.

There is also a species of