I am 17 and i can keep and erection. I have had sex with over 15 people and more than hundreds of time. I can get some of the most attractive girls in the school in bed with me but then once i do i cant keep it up. every once in awhile i can but over the past few months its becoming more common. I know how to get them to have an orgasm with out having sex but when it comes to sex idk if im thinking to much. I just really need help cuz idk if i have ED or not. I am looking for anything that will help.