First thing first that was rude of me earlier so I apologize. Second thing you did not have to say the world revolves around you ,but when you suggest things like them having to cover up a deformed or missing limb for the sake of your comfort that's a pretty selfish thing(maybe saying the world revolves around you was too much to say the least) I'm sure you are not the only one to feel awkward or uncomfortable with people that have these issues. I say that to say they suck it up and you should as well. You look them in the eyes of you have to have extended contact with them and try to be as engaged with the conversation as possible. The reason why people are annoyed with you asking these questions is because. Social cues which seem to be very obvious about what you shouldn or shouldn't do seem to eluded you and go over your head. I suppose it is a good thing your asking for advice instead of offending someone.