Ok so I've just started having sex, and I know it's normal to not last long, but the girl Im with went out with this guy for a year and she said he could go so long that she would ask to stop before he was done. She says she doesn't notice that I don't go that long cos I can get her to cum once, but there was one time where she asked if I could keep going. Is this just a control issue and I've gotta learn not to cum, or do you build up a tolerance like with drinking?