If you want a solid science book on this topic check out THE RED QUEEN by Matt Ridley. Great book. If you want a science-y tongue-in-cheek thing, read this post.
All animals are perverts. It was humans who invented vanilla
newt in the throat
Long story short, if you have a fetish, somewhere out there there is probably an animal who has it too. Congratulations.
I know you all are just waiting with bated breath for me to launch into a discussion of bonobos but you know what, EVERYONE talks about bonobos. Bonobos enjoy sex, okay? But so does every other frickin’ species out there!
(Okay, except bedbugs. And ducks. And a few others. We won’t go into those kinds of sexual evolution in this article though.)
I’m gonna throw out an idea that may seem novel here. Animals don’t have sex with the intent to reproduce. Most animals have no idea what reproduction even is; lady animals will suddenly have smaller versions of themselves popping out of their nether regions with no clue why, like wtf why do I suddenly love these so much.
Animals have sex because slappin’ genitals together feels good, dangit. That’s why sex feels great in the first place. If you didn’t get hungry, do you think you would eat? No, you’d sit there on the couch watching netflix until you starved to death. Similarly, if sex wasn’t so gosh darn enjoyable, we wouldn’t be driven to reproduce. And then no babies would be made, and that would be the end of that.
(Unless your species is parthenogenetic, like whiptail lizards, except even they mount each other in glorious lesbian dominatrix fashion to hump their partner’s eggs into fertilizing themselves.)
If animals didn’t find sex enjoyable, would they masturbate so much? And let me tell you, if an animal can figure out a way to pleasure itself, by god it will do it all the damn time. I work with monkeys. Don’t test me.
Animals don’t have sex to reproduce. Animals have sex because fuck yeah.
. . .