Watching TV with mom

I turned on the TV for "How I Met Your Mother." The opening scene had Barney hitting on a woman in the bar (shocker).

Mom: What's going on? Is that woman an idiot?
A.: Well, probably, but not officially. She's not a regular character.

Later

Mom: So they all live in that one apartment.
A.: Mostly.
Mom: Why?
A.: Because they just do.
Mom: Why do they all live in the same apartment?
A.: Because they do.

Later (after the show)

Mom: Why do they all live in that apartment?
A.: I don't know, mom.
Mom: Why are you watching this show?
A.: Because it's funny.
Mom: I don't think it's funny.
A.: That's okay.