Hey i have some question about sex i have been with this girl for some time and we were both virigins i tried only 2 postions with her i know its a bit dangerous when woman is on top on you but i love it and it works perfect for me but twice i tried missionary position it works just fine i dont know for 2-3 minutes i see she enjoys it alot but then all of a sudden it just stops working its really down so i have to make it hard again its a torture so does this thing really happens or is it just me and few times i cant get him hard no matter how hard i try. Thank you for your answers.