Because Eric asked for it, here's a quickee sketch of teen males at play on the schoolyard. No they're not in undies, it's athletic wear. :) They have some mini sponge basketballs and playing a game of dodgeball. Yeah, dodgeball, no sexual undertones here, what are you looking at? *nervous shifting of eyes*
(it wasn't till I uploaded this that I noticed the trajectory of the ball is going kinda low and might be construed sexually, really though it's all innocent.)