Bart: Dad, when did you record an album?
Homer: I'm surprised you don't remember, son. It was only eight years
ago.
Bart: Dad, thanks to television, I can't remember what happened eight
minutes ago.
[Everyone laughs uproariously except Bart]
No, really, I can't! It's a serious problem.
[Everyone laughs again, and Bart finally relents and laughs too]
What are we all laughing about?
Homer: [joyously] Who cares? Anyways...
-- "Homer's Barbershop Quartet"
