"A preposition is something you should not end a sentence with."
Reminds me of a joke:
A southern belle is on spring break with her friends when a couple of preppy types settle in next to her on the beach. She tries to be friendly to the nearest girl and says "where are y'all from?"
The snooty girl says "I'm from somewhere where they teach you not to end sentences with a preposition."
Without missing a beat, the southern girl says "where are y'all from, bitch?"
* A preposition is something you should not end a sentence with.
* Never use stupidistic adjective forms.
* All generalizations are bad.