Puting a penis in a vagina for reproduction in natural. No one can deny that unless you are deeply retarded.Unnatural is puting a penis in an anus to reproduce yourself. Not gonna work
No gay is having anal sex thinking they are going to produce a child... They are doing it for their own pleasure.
So why exactly is a gay guy having sex for pleasure some morally degenerate thing, but someone hooking up on Tinder with a girl for a one nighter somehow more acceptable?