sounds more like you. lol just to point it out.
If he's 14, and scrawny don't do workouts yet. wait until he builds more fat to work those muscles over... maybe when he reaches 16 or 17, for now he should just be jogging to keep in shape and hope he naturally gets a bit thicker in a few year, then worry about muscles. 115 lbs seems light for a 5"5 .... i'm 5"8 and 140, not fat or skinny.