How big do you have to be to hit a cervix? I know all women are not the same but give me an idea please. Also, because a girl is shorter or taller does it necessarly make a difference? I'm 8.5 and my girl is like 5"7 or 5"8 and I'm worried I won't fill her up. And for you larger guys have you had issues with this and hurting her? I think u can make more room behind the cervix or are you just going thru it which I imagine is painfull. Have you had more grief cuz this or gotten more pussy cuz Ur larger?