Hey, My boyfriend and I just recently started having sex together, and for some reason he can't seem to cum. We've fooled around together before (without sex) and he's been able to ejaculate, as well as masturbating. But for some reason now he just can't seem to go. And it's not like he isn't aroused either, because he's hard the whole time. One time we had sex for something like two hours, and then went to jerking him off for another hour, and it still didn't work. So I was wondering if there were any tips? or any idea of why that would happen? thanks!