I remember there was another skit with his cousin, or sister, where Cookie offered his cousin every different kind of cookie that existed, and then it turns out that his cousin doesn't even like cookies! Interests and favorite foods don't always run in the family. Then Ernie came along with a grocery bag, offering some of the stuff that was in the bag to Cousin Monster. She eats everything that was in the bag, and then Ernie becomes upset because Bert is going to be mad because he doesn't have any groceries to take home. I only saw this skit once, I think it was season 28, but I am assuming it was older than that.