Because you never know when you're going to be craving "old country" dinner rolls. See also Crime.
Why start the workout any sooner than you have to? See also Gym.
Psst. Got something funnier? Add your own funny thing to do.
E.g. taco dinner, macaroni and cheese dinner, sushi dinner.
Even more idiotic than waving to someone waving to someone behind you, and a lot harder to take back or disguise. See also Awkward.
Yes, I have finally done it. (But I don't think that the guy was too happy.) See also Hair.