Ya, I got an urban legend for ya'll, it's a bit...well, cruel, but funny nonetheless.
This supposedly happened to a friend of a friend of mine, which means I don't believe it for a second, and neither should you. But, here goes...
There was a couple who were high school sweethearts. They graduated high school and ended up going away to different colleges.
He missed her, she found someone else and cheated on the guy. She told him this and proceeded to break up with him.

He still loved her though and proceeded to send her at least 1 letter a week for the next 2 months. At first, the girl put up with it, but eventually, she thought he was being obssessive and tried a tactic she thought might get him out of the pic for good. She went down on her new guy and had him snap a polaroid of it, which she then sent to her ex along with the caption "He was much better than you anyway! LEAVE ME ALONE!"
Somewhat shocked , pissed and hurt at recieving such a letter, her exboyfriend made a color laser copy of the pic after erasing the caption. He then added a new caption which read. "Mom and Dad, I'm having fun at college, SEND MONEY!" He then mailed a copy of this to her parents, her sorority, the dean of her college and posted it on the internet.
Do I buy this? Not for one sec, but its a great story, and I'd shake the dudes hand for that, which was a completley tasteless and brutal act. But ladies, I guess it goes to show ya, NEVER insult a guy's performance wtihout expecting some sort of revenge, at least according to urban legend.