A joke

I was laughing on this joke for whole afternoon. It's based on the language different. It was in Taiwanese.

A came to visit B. It's about lunch time, they'd like to go for a lunch but B was waiting for an E-mail. Therefore, B asked A to wait for 10 minutes. 10 minutes passed~

A: I'm really hungry, how long are we going to wait for this E-mail?

B: It's very important for me to wait for this E-mail.

A: Can't we go to restaurant and wait there?

B: No, I have to wait at home. It's important.

A: Give me his XXO phone number. What kind of big guy he is to make me wait so long? I never wait for a man entire life and I AM waiting for your man in your house. XXO. Who he thinks he is? Where does he live? An English name won't help him to get a girl. .........

B: Girl, E-mail is a letter we write on internet. ...

A: X%#$&* (Basically, A still has no clue of computer, internet and E-mail)