Did you know that you can get away with saying almost anything, no matter how blunt, if you end with the phrase "Love you!"?
It's true. A sharp criticism cannot be taken as offensive if those two little words are tacked on at the end.
Also "bless his/her heart" if you're from The South or wish to pretend to be from The South. As in, "My goodness, but that man is ugly... bless his heart!"
These are just a couple of the things I learned from the very cool teenagers I hung out with on the marching band trip.
I also learned that when you have one teenager, you have one teenager's brain. When two teenagers are gathered, you have one-half of a teenager's brain. And when three or more teens are gathered, you have no brains among them at all.
Bless their hearts!