Cancun moon
During sex, you put the girl in a position like doggy style. The like the “brute” sex position you face away from her. You put your dick in her ass, reach between your legs and grab a hanful of her hair. Every stroke you take you pull her hair back more and put a nice arch in her back.
I call this the Cancun moon because if she manages to look back at you she’s gonna see your ass right in her face while you go balls deep into her ass