I think...

I teach people the wrong stuff.(begins sidetracking) Darryl almost murdered me while we were playing a game(highly confidential, sorry.) on paper. He had lost to me several times in Rock, Paper and Scissors. But he did get his revenge when he beat me hands-down later. I ended with "Linda saved her horrendous defeat to Darryl."
But does this say about the title? NO! Well, where was I? *looks around* Oh yah. The title.
I teach people the wrong stuff. To tell you the truth, I made an obscene gesture at my younger sister when she was young. Then, when we were home alone, I spewed a whole barrel of vulgar stuff on her.
So, what do you think? Gimme a suggestion.