Calvin and Hobbes by Bill Watterson for January 13, 1991
Calvin: Hey Hobbes!..Hobbes! It's bedtime. Hobbes: Ooh, I wouldn't have wanted to sleep through that. Calvin: I wonder why we dream when we sleep. Do our brains get bored? I wonder why we don't just plain sleep. Hobbes: I think we dream so we don't have to be apart so long. If we're in each other's dreams, we can play together all night. Calvin: Hey, yeah! Well, I'll se you in a few minutes, ol' buddy! Hobbes: I'll be there!