It’s a joke that I heard when I was a kid, but still brings smile:
A man decided to learn english. He went to an english teacher who taught him the word “yes” and ask him to keep repeating it on his way home. While he was walking home, he met a boxer. The boxer asked him: “hey, wana taste my punhces?” The man replies, “yes” and guess what happened.
The next day the man goes to the teacher and says, “what kind of word did you teach me? It got me beaten so bad.” The teacher got ashamed and taught him the opposite of yes, “no” and asked him to keep reapeating the word on his way home. On his way, the man found the same boxer again, and he asked the man, “Remember yesterday’s beating?” The man calmly says: “no” and u can imagine what happened next.
The third day, the man goes to the teacher and asked him to teach him a better word. The teacher thought and thought and finally tought him the word “good.” The man is walking back home when he saw the boxer sitting on the curb, crying. The man went up to him and asked him, “What happened?” The boxer replied, “My mother passed away yesterday.” The man replied, “Good!” 
