I find it difficult to cum during sex, no matter how long the sex lasted for or how impressive the girl was, head,blowjob, styles, I just won’t cum unless I jerk off myself. I started finding it weird so I asked my friends about it indirectly and they feel it is abnormal, spoke to a doctor about it and he said it wasn’t abnormal but still I don’t feel comfortable because most girls wants you to cum to show that you were satisfied. I’ve had issues with my girlfriends in the past as a result of it.