Quote from Reese in The Grandparents
Victor: We're back. Still no parents? If you're going to work all the time, don't have children. Malcolm: Hey, I wanted ice cream. Reese: I don't blame you. Malcolm: Why do they always do that? They take you for ice cream and stuff and never ask me. Reese: I've thought about that. And I think they see me as the protector of the bloodline. If the future's half as bad as Grandpa and I suspect, the only survivors are going to be mutants, cockroaches and me... all living underwater. Let's face it: they're backing a winner. Oh, man, I'm stuffed. I shouldn't have had a second one.