to start off, tell your kids (or tweens for that matter) the entire face should not be shaved. oh yes. i know of 1 who wanted to shave his growing mustache but then thought he didn't like to have a hairy face and decided to shave it entirely. and so what he didn't want to happen was exactly what he got.
although his face may not resemble a werewolf's, when you touch it, you'll feel his facial hair. it's like touching your arm when you're having goosebumps. and when sunlight hits his face, his hair shines like edward cullen, minus the glitter. lucky him his hair is thin.
so moms and dads, if you see your young man with a shaver, help him out coz he might end up lookin' like chewbacca. :)