Calvin and Hobbes by Bill Watterson for February 14, 1993
Hobbes: Today is Valentine's Day. Calvin: So what?! Who cares?! Not me! Hobbes: Who's your Valentine this year?? Calvin: Nobody! Hobbes: Is it Susie?? Calvin: No! Hobbes: I bet she is! I'll bet your heart beats faster at the sound of her name! Ahh, how you long to gaze deep into her shimmering eyes!! Your cheeks are flushed! Your chin quivers to imagine her soft warm lips pressed against yours! Oh, to be locked for eternity in a passionate embrace with sweet, sweet Susie! Calvin: Take it back! Hobbes: Can I be "Best tiger"? Take it back! Have you picked out a ring yet? Take it back! Where's the honey moon? Take it back! Susie: Hey, Calvin! Calvin: Huh?? Susie: You jerk! This is for sending me a Valentine card with a drawing of me as a worm-eaten corpse! Hobbes: Oh hooo! You sent her a card?? Doctor Love, paging Doctor I.M.N. Love! Calvin: I'd say we're about due for another Saint Valentien's Day massacre.
I just noticed Hobbes’ tail is in the shape of a heart!