Across the entire animal kingdom? I'm no expert, but that seems obviously to not be the case. Edit: Just look at our close relative the Bonobo for an interes

Across the entire animal kingdom? I'm no expert, but that seems obviously to not be the case. Edit: Just look at our close relative the Bonobo for an interesting example of what human sexuality might have looked like in the past: https://en.wikipedia.org/wiki/Bonobo#Sociosexual_behaviour https://en.wikipedia.org/wiki/Bonobo#Sociosexual_behaviour