... Until I had kids.
  1. No you can't eat grass.
  2. You can't stick that up the dog's butt.
  3. Get your hands out of your pants.
  4. Do not play with your food.
    No, its not just a smart ass thing to say to your friends from time to time. Who knew?
  5. No playing "mountain climber" on the stairs.
  6. You can climb on the car, just don't jump in the sunroof.
    Specific, but I've said it no less than 10 times this past year.
    Suggested by @ameliaville