actually - any length or girth can be either useless or useful.
i've had exs come visit for sex-on-the-side from their current hung bfs bcoz he didn't know what he was doing or simply hurting her and i've seen girls praising friends with 4" dicks that continually get the job done
.
i think you're mistaken if u thought anyone said 6 inches was big, which i hadn't at least. and i think noone here would ever take anything a wg says at face value
.
i do see how u are still fixated on size however, and completely missing the point. sex is an experience. its success is based on the ability of each party to stimulate and help the other climax, and the ability to reciprocate and duplicate. my advice to all bros is to have fun doing it and not focus on size but rather to embrace the hobby, and enjoy it as much as i do