About English jokes

1, bill means money, and the gesture of holding a pistol gives people the feeling that you want money with a gun.

Have you eaten? Have you eaten?

No. I didn't eat (doesn't mean no, I didn't eat. Or no, I didn't eat anything. )

So you didn't eat anything. So you didn't eat anything.

Yes, I did (yes here means yes, I did. Or yes, I ate something. )

So you didn't eat for a while, and then you ate something, so it's strange that people don't collapse.