If its a girl I haven't been with 3-10 minutes, but can always go 3 or 4 times as long as I have a couple minutes between. With a regular, for example my last girlfriend, 30 minutes to an hour. Unless she was tired late at night, or one of us was in a hurry for some reason, there was no point in stopping after cumming just once. Studies show btw that the average guy is finished in 2.5 minutes. I don't count, I'm in good shape and use test.