BTW "hitting the cervix and causing pain" is easily avoided by knowing what the fuck you are doing. The canal extends beyond the cervix. The cervix IS NOT the cul-de-sac. Learn female anatomy. If a woman is on her back you go UNDER the cervix. You do need to bee careful doggy style tho.
Sounds like somebody has a little wiener to me. I mean a "caplocks on" LITTLE WIENER. Get over it. Regular women like guy on the large size. They want it to hurt a little. Makes 'em feel special. Too big and they may run. A fat 8 to 9 inches gets them OFF though.