Comment by Kristine1975

Because some animals fuck anything that moves and doesn't, including dead animals[1] and other species[2]. Not sure if applying human categories such as "homosexual" to non-human animals is helpful, though.

[1] http://www.theguardian.com/world/2012/jun/09/sex-depravity-p...

[2] http://www.bbc.com/earth/story/20141117-why-seals-have-sex-w...