GRAMP: The best way to explain it is CHRISTMAS EVE. As your parents tuck you in, you dream of the pancakes Dad makes the next day. ARTHUR
GRAMP: You dream of the little marshmallows Mom puts in the cocoa... you dream of Dad putting together your bike, or Mom playing boardgames with you... but... guess who SHELDON dreams of as he falls asleep? ARTHUR
ARTHUR: Oh. GRAMP: And THAT'S why I'm getting him a pet for Christmas.