This is something that I've wondered about for a while now. It's no secret that a lot of girls hate it when you hit their cervix during sex but like the feeling of fullness a big penis provides. I've found that during the initial part of sex girls don't mind it if you push in all the way to gently make contact with their cervix, but when you really get into it you have to control yourself so as not to hit it and cause discomfort. I've also noticed that when girls are on top they are quite content to use only half of what you have to offer and can have orgasms with just that. My current gf doesn't want to feel me anywhere near her deepest spot from the very beginning and we still have great sex without really deep penetration. So basically I'm asking do we really need to use the full length of our penises (penii? :smile if a girl can orgasm from only a small portion of it. That would back the argument that size doesn't matter since only using 5.5 inches of a 9 inch penis would be the same as sleeping with an average sized guy and if his technique is on the spot it wouldn't matter. Or would you feel cheated out of your 3.5 inches even if you were only going to use them for 2 minutes of the session?