It makes sense from a why standpoint. I can’t help but wonder about the how.
How did we evolve reproductive organs that are not only sensitive, but also release reproductive cells at climax?
I’m ok with a “we have no idea” answer, but if there is an answer I also want to know.
Horniness is a weird thing. You’ll climb over rusty nails for sex even if you don’t get the Big O with any reliability.