Continuity mistake: During the entire scene when Darcy is first introduce and handing out boxes, the position of her hair keeps changing. At times one side is along her back then it is on her front side. Also both sides are doing the same, being either in front or back.
Continuity mistake: After Nick has tried on the pantyhose, there 2 small towels on top of 2 bigger ones on the towel rack. They appear to be neatly folded and even. The scene cuts to his daughter walking in then back to Nick. The small towel on the left side is now shorter in length and not neatly placed.
Continuity mistake: Nick's daughter has no braces in the beginning, and her teeth look post-braces straight. Later, she has braces on when in her bedroom with two friends halfway into the movie. Then she doesn't again.
Answer: The joke is that they have no thoughts for him to hear.
Garlonuss ★