Student: Oh gosh! I must be a goldfish.

Me (staring at my student with eyes wide open): Come again?

Student: Don't you know? Goldfish can only remember things for 2 seconds.

Me (incredulous): Really?! Where did you learn that? *thinking that perhaps, my student watches National Geographic or Discovery*

Student: On a funny variety tv show. The goldfish's poor memory explains its fat body. Since it cannot remember if it has eaten, it always opens its mouth to eat.

Me (laughs): So the goldfish's poor memory explains why its mouth is always open!

Student (nodding enthusiastically): The goldfish's poor memory also explains why it won't get bored swimming in circles in a small tank. *gestures a small rectangular tank* It doesn't remember it has swam past the place after 2 seconds!

Me (laughing): Hmmm... ok. That's very interesting to know.

Student: The host of the variety show also told a joke about goldfish. He said that all goldfish in the world have the same name.

Me (puzzled): Really? Why?

Student: Because if you look at them in the tank and ask what's their name, they will tell you, "Bob!" *imitating the goldfish burping air bubbles*

Me (laughing really hard now): Haha!

Student: So when two goldfish meet in the tank, they will have the following conversation...

Goldfish A: Hi! What's your name?

Goldfish B: Hi! My name is Bob.

Goldfish A: Oh! My name is Bob too! Nice to meet you. *swims away*

Student: They will constantly repeat this conversation because after swimming one round in their tank, they will meet again and forget that they met!

Me (trying hard to control laughing): That was an interesting fact. Time to get back to tuition. Try to concentrate and remember the correct spelling ok?