I have one!
My department used to do a big potluck lunch for Christmas. The plan was that you could either contribute $10, or you could donate a food item worth roughly that much. I pretty much ran the whole thing.
My coworker Jim, who's always been an odd duck, told me "I'll contribute a casserole, but you'll have to cook it for me.". I said "Um ... no. I won't have time for that.". "Then someone else can do it.". "NO. They can't. You can either cook it yourself or bring something else."
He then hurled a ten dollar bill at me, spitting "I can't cook it; it's too much work!"
Funny how it became too much work when HE was the one who'd have to do it.