It probably started at a young age. His father would always snap cucumbers in front of him, telling him that if he didn't behave, he would suffer the same fate.
#68 I don't think a man can get his penis "ridden" if he's on top while being intimate with a woman. As #7 said, the man gets full control when he's on top
I did misread it a bit. I thought #7 said, that the woman should be on top, so he could pace it. But now I read it again and realised my mistake. Still, if he would let her be on top, then my comment does make sense.
As long as you two don't try any positions that make him bend at awkward angles, he should be fine. If he really is that afraid though, let him get on top so he's in control.
Well that's my excuse for being alone atleast.