Well basically sometimes actually the majority of the time i last a pretty good while...around 20-30 min. And then i have times where i have gone for over an hour and half. Actually quite a few occasions. But the thing that really bothers me are the times i cum rather quickly...like under 10 or 15 minutes. To me this is almost embarresing when it happens. Just because if im with a girl multiple times it seems to be a let down to them. Even though they always cum still themselves. I guess i just cant quite understand it. Like what would cause this. Anyone have this type of stuff happen?..I would assume so but the biggest thing is i dont know WHY it happens.