Don't explain 'Unisex' by letter

A Chinese lady was shopping at a big brand fashion store in Manhattan, NewYork. She searched a lot styles of clothes, finally picked one of her like. But the question is, the style of the dress is too modern that she was not sure whether it is a woman's dress or a man's dress.
Then a tall, strong server man is coming towards her, so she showed the dress to the server man and asked, 'For girl or boy?'.
The server answered, 'Unisex', which means the dress can be worn by both man and woman.
But the Chinese lady never knew a dress could be 'unisex', and never heard the word before, so she misunderstood as 'You need sex!', by which she was very astonished and not sure what the real meaning is.
The server noticed her doubt and repeated by letter, 'U-N-I-SEX'.
This time the lady heard clearly, 'You and I Sex!'......

"No English"

In mid 1980's a few Chinese students came to live in a small university town in Canada. They found out that washing and drying clothes in an university apartment complex is free for its residents. Even though they were not living there, they went to the complex to wash clothes every week to save 25c per load if they wash at street commercial laundry room. In mid 1980's, 25c is a good amount of money in Chinese standard.

However, the manager of the complex found that. One time, they went there again, but were caught by the manager.
"Did you see this?", the manager pointed to the "For residents only!" sign.
"No English", they pretended to know no English.
"Do you know that you have to live here to use this free service?"
"No English."
"According to the regulations, you guys will be fined for $25"
"No English"
...
"No English."  That was the only answer the manager got in more than 5 minutes conversation. He found useless to continue any more.
"Apparently, you can not understand what I am saying.  I will forgive you guys this time. But, never come back again."
"Thank you!"

"I didn't buy anything"

In past of China dozens years before in Mao's society, Chinese were in circle struggle everywhere, revealing privacy and criticizing the wrong thoughts by public humiliation among each other, worse even arresting the poor guys to prison who may just said something wrong, so it caused Chinese non-confident among each other even in family, and very cautious in public to keep self innocent and to avoid trouble.

That is the environment and education my friend Happyyl received in his grow up, so he had an embarrassed incident happened in a few days when he first came to Canada from China in the mid 80's last century. Upon the arrival of the university town, he immediately went to K-Mart for some necessities.  However, he could not find anything there priced within his limited budget ($360 stipend per month) and decided to go on to another store.  However, having not gotten used to the Canada's open-shelf style store, he felt really uncomfortable to walk out the store empty handed. After some mental struggles, he went to one girl cashier (he thought he was handsome enough to be good impressed to her) and uttered “I didn’t buy anything”. 

She stared at his eyes. Afraid of his poor English, he said the same thing again. Her eyes grew even bigger and rounder. He felt face hot and thought “Gee, is my English that bad? After all my TOEFL scored more than 600 points”.

Quickly checked all his words and grammar, he repeated the sentence once more, “I didn’t buy anything”.

After one minute or so (he guess she had finally realized what is his real meaning), she smiled and said, “I know.  Just go.”