Whose Line: World's Worst

For those of you who know of the show Whose Line is it Anyway, this is a pretty fun game to play. What happens is, one person will come up with a subject and a line for the world's worst "___" and the next five people will come up with a line for that same subject. The fifth person, however, comes up with a new subject after their line. I'll start: The World's Worst Babysitter. "For the last time, good grades won't get you sex with me."