only a fool would suggest that procreation was designed by nature/god

You got that right, Ake.

There is no design, just ever evolving process that comes out of beauteous Godless nothing. When we fuck we commune with utter senselessness, possessed by a primal lustful passion that comes welling up from our darkest most base animal biological subroutines in which nature cons us into procreation by giving us an orgasmic addiction to the glories of the flesh which might eclipse all other considerations in the raging instant.

Gay, straight, whatever - it's all as NATURAL as anything else; men end up with a G-spot up their arseholes - which you no doubt see as intelligent design, especially as it chimes in with the delightful passages of anal sex in The Song of Solomon. Mostly we're dealing with basic sensual joys & carnal pleasures that existed MILLIONS OF YEARS before ever we figured the causal link between sexual intercourse and pregnancy. And what was our first response to that? CONTRACEPTION!

The reality is, human beings fuck one another in all sorts of delightful ways for pure holy joy of the thing - there is no right or wrong to any of it just as long as its consensual, above board and legal.

The only truly Unnatural things we've ever come up with are GOD & RELIGION.