I am a 25 year old gay male, and I have a question regarding anal sex. I have been having sex with the same guy for the last 4 years and I am the bottom during sex, but lately the last 6 months or so I have been having what feels like a sharp pain in or around my bladder when he is deep inside of me. His penis is on the larger side, but I did not have this pain before. Why all of a sudden after 4 years of having sex am I getting this pain when he is deep inside of me?