If you came to this site regularly, or read my books, you’d know that I can’t stand the word “normal.” That word implies that you’re like everyone else, and we are all unique individuals and so we can’t force ourselves to be like the majority. At 4’7” I’m not a normal height, but there’s nothing I can do about it, and I certainly never let that hold me back. The love of your life gets sexually aroused when he’s humiliated a bit by you. It’s not something that arouses most men, but it’s not a serious problem, especially as you don’t seem to mind. You should try to help him not to feel so badly after these sessions. If that doesn’t work, then he should seek psychological help, but not necessarily to rid himself of this desire, but to understand that it’s not such a bad thing.