Well, from what Dan has said, that is not true. Dan was slim, in his 30s and probably could have scored with a non prostitute when he was in his relationship with a Pattaya bargirl.
So there is something more to it mentally i think.
if he could of scored with a non prostitute he would of. but he didn't. slim in his 30's means nothing. sometimes guys just can't get a woman. period.