I have a question, so everytime me and my SO have sex it never hurts. this morning we were going at it and we did everything the same and we do the doggy style all the time. this time he hit it and it hurt when he went all the way in. it never hurts. it only hurt when he went all the way in. but it never hurt the multiple times before. I'm so confused. why is it hurt? we are trying for a baby but he has low sperm count. but that still doesn't say as to why it hurt. can anyone help??