Mom: Which glass is mine?
Primo: I don't know. Just take a clean one from the cupboard.
Mom reaches for a glass and selects not one of the brewery souvenir glasses but something Primo got at a political event and labeled as such.
Primo: But not that one!
Primo: Not that one.
Me: Why not?
Primo: What if it breaks?
Me: Because my mother is in the habit of throwing glasses to the floor?