What does the comb under the pillow say?

There is no point in putting a comb under the pillow at night. You can comb your hair with a comb during the day. Do you still comb your hair at night?

Impossible, then why did you put the numbers below?

Does superstition mean nothing? In fact, the bottom of your numerical equation is likely to hurt people. When you sleep carelessly at night, you may hang your hand on the number. If you sleep hard, you may even hang a comb on your face and neck. Isn't that a little more dangerous? So don't put anything on the bed at night. If you put something away, you may scratch someone.