Oh, teenage boys. How do we love them, let us count the ways. (*Pause here for epic moment of silence*) God love teenage boys, because they certainly need the support. When my two brothers were teenagers, there was no limit to the grossness they would create together. Even now as adults, when they get together for any prolonged amount of time, they immediately devolve into their teenage selves, which equates to one heaping pile of gross.
Luckily, gross has its benefits -- like being insanely hilarious to boot. One mom found this out first-hand when she asked her gang of teenage boys to go outside and rake up the backyard. It was covered in leaves. They did the chore as asked and with no complaining. Which made her suspicious, and rightly so. They arranged the leaves to spell out "PENIS." Though, give credit where it's due -- they did a thorough job of it.