What's the joke that satirizes people and doesn't offend people?

Several boys are smoking. Someone tipped them off. The teacher called them one by one to talk:

The first boy truthfully admitted being beaten; Back to the dormitory, said:

Dude: I want it all, so don't admit it.

[Scene 1]

Teacher: To be honest, do you smoke?

Boy A:No. 。

Teacher: No? Well, French fries, please.

Boy A naturally stretched out two fingers and took it. ...........

[Scene 2]

Teacher: Do you smoke?

Boy B:No. 。

Teacher: No? Well, French fries, please.

Boy B is holding French fries carefully because he heard about A.

Teacher: Don't you want some ketchup?

B accidentally got too much, and immediately played DD with two fingers.

Teacher: You are very skilled in not smoking. Call your parents. ............

[Scene 3]

Teacher: Do you smoke?

Boy C:No. 。

Teacher: No? All right, French fries.

Because of the first two examples, the boy C carefully finished the French fries with sweat.

Teacher: Aren't you going to take a root home for your classmates?

Boy C picked up French fries and put them on his ear. ..................

[Scene 4]

Teacher: Do you smoke?

Boy D:No. 。

Teacher: Good. Have a French fries.

The boy ate the French fries with trepidation and put them in his coat pocket.

The teacher suddenly shouted, here comes the headmaster.

The boy was so busy that he took French fries out of his pocket and threw them on the ground, stomping on them. ......................

[Scene 5]

Teacher: Do you smoke?

Boy: No.

Teacher: Good. Have a French fries.

The boy just took the French fries,

The teacher said: Don't invite me to dinner?

The boy was so busy that he handed the chips in his hand and then took out a lighter. ................

[Scene 6]

Teacher: Do you smoke?

Boy: No.

Teacher: Good. Have a French fries.

The boy ate French fries with trepidation and put them in his upper pocket.

The teacher suddenly shouted, here comes the headmaster.

The boy has sweated his palms and bowed his head and said, hello, headmaster!

Teacher: The headmaster will smell your mouth.

The boy took the French fries out of his pocket: it's safe, it's still there, the fire hasn't lit yet …

[Scene 7]

Teacher: Do you smoke?

Boy: I swear to God, I will never smoke again.

Teacher: You really don't smoke? Ok, let's have a French fries.

Boy: It's natural to take away the French fries and eat them clean.

Teacher: That's a good boy. What brand of French fries do you usually like?

Boy: [Get carried away] Greater China .....