>>81540172It's a gooner thing specifically because that's not how you normally masturbate, so you do not touch your penis so it's sorta humiliating in the idea like you're not allowed to touch your dick but also masturbating this way with your penis backwards supposedly (dunno if just a sorta pretending thing by gooner circles for fetish purposes or real) damages the nerves or whatever and makes your erections weaker thus giving you erectile dysfunction after doing it enough times.
tl;dr men do not masturbate this way, it's not even really pleasant, so only humiliation/feminization gooners do due to the implications.