Have you always had this body concern about yourself, or have you developed it in your new relationship? I ask because you say you were not having sex at all in your past relationships. It sounds like you are now having sex, but now focusing on an issue you have come up with by yourself, not your partner. You are having intrusive thoughts over it and it is disrupting your sex life.

I’ll weigh in about size- good sex is whatever two people agree it is.