Why does it take him so long to cum

This guy I’m seeing lives about an hour from me so we don't have much time together as would like. We just recently started having sex and I noticed that it takes him a long time to cum, like an hour. Not that I don't enjoy the hour its great but it’s just got me thinking. I heard that when men haven't had sex in a long time, they usually cum a lot quicker. But we haven't had sex before and he hasn't had sex in like 6 months. Why does he last so long?? Like at first wouldn't he cum right away since it’s been so long? Maybe I’m being paranoid but I just keep thinking that maybe he has been sleeping with other women?? I asked him why it takes him a long time to cum if he hasn't had sex in so long and he said because he still jerks off but still, I know it’s not the same feeling. Real sex us more intense. What do you think? Am I over reacting?