Calvin and Hobbes by Bill Watterson for July 29, 1989
Dad: This vacation sure went quickly. I can't believe it's time to go home so soon. After being out here, it will sure be a culture shock to go back to civilization, won't it? Calvin: Man, I can't wait to get in the car and crank up the A/C and some tunes. Shake a leg, huh? Dad: Someday I'm going to get my DNA tested and see if he's really my kid. Mom: Take my word for it.