Yes because when you want something to be perfect you tend to try and imagine it beforehand so you know what to do perfectly and if you mess up you can imagine punching the person who messed you up :)
Unless he wants to go to like community college or something.
It depends if you an athlete, if you workout, or if you do neither of those things. The average 16 year old that doesn't exercise regularly should consume anywhere from 150-350 grams of protein in a day.
Teach them how to play soccer. give them a few polite tips, but never make them feel inferior