Most Helpful Guy
"Hey you're a pretty cool kid, give me your number so we can talk later".
" can I have your number".2
Most Helpful Girl
Well, a demand isn't a question, it's an order.
"GIve me your number." is a demand.
"May I have your number?" is asking a question.
Not try to be a smartass, I just don't see how it could come off as demanding by literally just blunt asking, "Hey, can I have your number?" Why not just give him your number?1