I want plenty of help. I bet a lot of you can add to this. 1. Do I know you? I mean, who can tell if I can't tell? How would you know if I know you? So what is number 2 and 3 and more?
See this video to help understand why I used Do I know you? A man was being stared at and it was his question. Another is to ask the man staring Can I help you? Help him do what? He does not know you. He only stared at you. What the hell kind of a question is it to ask Can I help you? Do what change a tire?