BATHROOM HUMOR

Can you think of a sign frequently seen in bathrooms consisting of two four-word sentences? The second sentence differs from the first in only one word, one letter, and one punctuation mark.

Sentence #1:       WE   _ _ _   _ _      _ _ _ _ _ _.
Sentence #2:    _ _ _    _ _ _   _ _ O,  _ _ _ _ _ _ .

Answer:

      WE AIM TO PLEASE.
YOU AIM TOO, PLEASE.