One of the parents needs to be somewhat on the ball for the sake of Conservation of Competence, and you want the characterisations to be relatively consistent rather than a constant game of Idiot Ball. You know that every time the dad is shown to be somehow "superior" to his wife, you'll have a protracted battle with the Moral Guardians, but not so the other way around. What are you gonna do?
Invoked: Alice specifies in her Lonely Hearts ad that she's looking for an Adult Child with whom to settle down and raise kids.
Defied: Alice breaks up with Bob when she sees that he is too immature to raise a family, and not likely to change any time soon.
Discussed:
Conversed:
Played For Laughs: Almost always is.
Played For Drama: Bob's mistakes and selfishness negatively affect his family.