I'm at roughly 8 Nbpel and 6,1 girth right now. I've never considered myself as genius or magician when it comes to technique (or I'm a talent by nature
). Also my dick doesn't have any fancy form and is pretty straight so there can't be any g-spot stimulation involved. I've always ascribed my success to my size (though, like I said, in another thread, it's been a long time since I fucked anybody else than my current gf).
But girth surely does matter? I mean it's pretty common knowledge that the area at the entrance of the vagina is very sensible. So this would make it another important factor of vaginal orgasms other than g-spot or a-spot induced ones.