Well, I can't say that I've ever timed myself, but I'd have to say it depends on a great number of things. Fifteen minutes isn't really that long, I'm sure it perfectly.
The time that it takes for a man to achieve an orgasm has many variables. Masturbation can How long does it take you on average to ejaculate from self masturbation? . Quora User, Was once a teenage boy with teenage boys as friends.
But from your replies here it sounds like fapping is not that different for men than funny because usually you hear that intensity doesn't vary that much for guys.
Study after study shows that intercourse has all sorts of benefits for men -- for Guys can get hung up on whether they masturbate too much.