This isn't exactly a contest or promotion idea, maybe more of a poll or ballot issue. For our radio station clients, this would make a nice topic along the lines of...
"OK, so what did your boyfriend try to pass off as a Valentine Gift?"
And, since this day is on a Friday, you can offer your listener the option to 'trade up' with a better Valentine gift that you are offering that can be used on the weekend. Hopefully, you're going to tie-in with a client that has done a nice contest box promotion with you in the past! You see how it all comes back! Sneaky, huh?