Mr.Z jokes

Until now I still cannot forget the jokes from my english lecturer. This is how it goes.

Sir: A good friend. How can we say that a good friend is a good friend? You.. in the green. Do you have a good friend?

Green boy: Yes. I do.

Sir: Is it a he or a she?

Green boy: Its a he

Sir: Is he is in this class?

Greenboy: Yes. He is my good friend (pointing to a boy sitting next to him)

Sir: Oh..I see, he's the one. Why did u say that he is a good friend.

Greenboy: Coz he cares about my studies and we always do discussion.

Sir: Oh, that's romantic. Anything more that u wanna add about him?

Greenboy: No more.

Sir: You see.. There should be 10 reasons to approved that a good friend is a good friend. You just cannot simply say that he is your good friend bcoz he cares bout ur study. There must be 10 reasons to support the caring values. Yes, he may be a good friend in front of you. But, at your back, he's been stealing ur money and wearing ur underwears.

All student: *speechless*