Calvin and Hobbes by Bill Watterson for June 23, 1992
Hobbes: I like my smock. Calvin: Good. ...Ok, I'll divide up the clay. Here's yours. Hobbes: You can tell the quality of the artist by the quality of his smock. Calvin: Uh huh...you have to work this stuff a bit to get it soft. Hobbes: Actually, I just like to say smock. Calvin: See, just knead it like so, and then it can be modeled. Hobbes: Smock smock smock smock smcok smock! Calvin: What on earth is wrong with you?!