My ex-wife was like this. She had a very shallow vagina (about 4" to her cervix) and I, even at 6.5", would hurt her. This was very frustrating for me. When I found my next girl it was awesome to be able to go all the way in. Then when I got with my next girl, the one I was with as I gained all my size, could take almost everything at about 9". At that point of insertion as I made my way around the cervix allowed me to give her huge, massive squirting orgasms.