Guys don't follow that rule (unless they are gay), they worry about women following it. It appears to be originating from a post on the (rather toxic and apparently now defunct) reddit sub /r/FemaleDatingStrategy many years ago, but apparently is still being brought up.
Worrying about women following…
Still a guy issue/hang-up then.
Ah, and all those women worrying about men following PUA influences, is that also "still a girl issue/hang-up then"?