2. A Blood Stain

A: What's this stain?

B: I don't know.

A: It looks like blood.

B: I think my nose was bleeding.

A: You should wet your shirt immediately.

B: Why?

A: Because that gets the blood out of the shirt.

B: What's a little blood?

A: Your white shirt is ruined.

B: So, I'll just buy another one.

A: You can wear this one around the house.

B: Next time I'll soak it immediately.