Lin is talking with Smith about his necktie

L:          Oh, that's a good-looking tie.
S:           My older sister gave it to me.
L:          She ofter gives you things, doesn't she?
S:           Yes, she does.
L:          Do you ever give her anything?
S:           No, I only receive things.
L:          How nice! How lucky you are to have such a nice sister!
S:           But you have a cute younger sister, don't you?
L:          Yes, but she doesn't give me anything.
S:          Do you expect to get things from your younger sister? It should be opposite. You ought to give
             her things instead.

               Smith is always receiving gifts from his elder sister. He looks happy wearing the necktie his sister gave him. Lin, on the other hand, has only a younger sister and is envious of Smith.