Richard, here’s the deal: you were talking to a grown man who just happens to be in a wheelchair. I’m sure the man you were talking to realizes his life situation and has accepted the fact that just about everybody he talks to is going to be taller than he is. Does an NBA player crouch down when he speaks to somebody shorter than he is? No. Do you stand on a foot stool if you are talking to an NBA player? No. The only reasons I can think of to crouch and speak to another person is if that person is a child or if that person is some sort of a king who will have you beheaded if you don’t crouch down.