For years, there is been a stereotype that men have orgasms easily. Studies have shown that some men have difficulty ejaculating during sexual intercourse, or that they ejaculate a long time after sexual intercourse has begun. This isn’t a very common ailment in men, but there have been quite a few studies on it in the past years, meaning it is becoming more of a problem over time. So, what causes some men not to be able to have an orgasm during sex? The reasons can vary, and studies have shown that having these types of problems is not uncommon.