[flashback:]
Lois: Are you happy now?
Hal: Me? How is this my fault?
Lois: You are always regaling him with tales of your wild youth.
Hal: Those are cautionary tales.
Lois: Cautionary tales do not end with "It was so cool."
Young Malcolm: Mom, I think I broke my chemistry set.
Lois: In a second, Malcolm.
Hal: All right, do me a favor, Lois. Make me a list of pre-approved childhood memories so I know what I can and what I can't share with the boys.