Starting tomorrow the prettiest of all the pretty boys, Zac Efron, will appear in “High School Musical 3,” the final chapter in the franchise that made him a star. While we were a little turned on by his performance in last year’s “Hairspray,” we just can’t get over how there isn’t a stray hair on his head, and how perfectly groomed his eyebrows are. Was he born this way, or does he have a glam-squad that keeps him beautiful? We’re inclined to think the latter. Pretty boys are nice to look at, but we don’t think we’d date one for fear that people would take one look at us with them and scream, “Mismatch!” Below, some pretty boy archetypes.