Dear Welcome to HCM We understand your concerns I went through your details. You had been to many doctors and they are sure both of you do not have any such problems which gives pain to his penis. You say, lubrication is also not the problem. In the above cases, there is no reason for him to have pain while intercourse. Are you sure your boy friend is not faking pain? If not, this could be his obsession. He could obsessing with pain. Psychological counseling should do the trick. If you require more of my help in this aspect, please use this URL. http://goo.gl/aYW2pR. Make sure that you include every minute details possible. Hope this answers your query. Available for further clarifications. Good luck.