my boyfriend and have been dating since 3 months. we have sex not more than twice-thrice a month. he does get an erection and we have sex for more than 25 minutes too but he does not cum while having sex with me. after he gives me an orgasm, he masturbates. we have protected sex and getting me pregnant is not his worry. also, he does not have any other issues on his mind while we have sex. i have also had many boyfriends in the past but have never faced this issue. he has also not faced such a problem in the past. he says that having sex with me does not excite him and thus he does not cum. i have tried giving him a blow job and hand job, yet nothing works. on suggesting different positions and role plays, he said that wont work too. we love each other way tooooo much and do not want this to make our relationship suffer. pls advice