Hi, I've had a problem pretty much my entire sexual life, in some ways a great problem to have but it really gets me down. Basically I have no problem getting hard, but I rarely cum during sex and pretty much only when I am being ridden. This means that generally girls cum during sex a lot more than I do, which is great in some ways, but the fact that I don't is difficult for them and me. Bizarrely, if a girl blows me I'll come, if she jerks me I'll come but when I'm inside, whilst it is great, I rarely feel close to cumming and regularly lose my erection. I don't think it's a physical problem, I'm thinking either a) I jack off too much (once daily I suppose) and have got too used to it or b) I've got some weird issue with it that I haven't worked out yet. Has anyone else here ever suffered from this? Any thoughts or ideas on how to deal with this?