i generally have not been a fan of having sex for a "long time" - too many things to do, like sleep. There is one partner I've had, that I have gone back to over the years here and there - goes in spurts, sometimes often, sometimes not for almost a year - but I keep going back because it's that good In that instance could be 1-2 hrs, but not more than that. Otherwise, get it done in 15 and i'm good.