We are a bunch of "degenerated baboons."

Female baboons show their butt to attract dominant males for the good of the species (survival), women, theirs to be attractive for their own sake! https://agaudreault.files.wordpress.com/2020/12/sexualization3.jpg

This is another example of what Ivan Illich calls "radical monopolies in Tools for Conviviality, defined as social behaviors which take the means for the end.