did he cum.....

Talking with a friend the other day, she mentioned he anioance with the man she was dating. He can't cum, she said. he would not stop bothering me, morning' noon and night!I then starting thinking about a friend who complains of not being about  not being able to with a condom. then it struck me.... had my lover cum last weekend? we fucked for almost 4 hours, there was no extra wetness, no sweet taste to him after as i went down on him. How could this be? anyone out there have an answer?