Peanuts by Charles Schulz for December 17, 1991
Transcript:
The Literary Ace sits on his doghouse and types, "Dear Sweetheart, Merry Christmas."<BR><BR> Lucy reads the letter and asks, "Is it appropriate to call someone 'Sweetheart' on a Christmas card?"<BR><BR> Snoopy thinks, "It is if you can't remember her name."<BR><BR>
I’m surprised Snoopy didn’t shorten in to “Sweety.”