A young man is walking in the park when he saw a wrinkled old
man sitting on the bench and smoking a cigarette and started
coughing after a few puffs.
Seeing this, the young man sat down beside the old man and decided
to persuade him to quit smoking for his health's sake.
"Uncle, smoking is bad for your health, quit now and you might live
to 80 years old."
Upon hearing this, the old man started to laugh.
"Why are you laughing uncle?" asked the young man.
The old man look at the young man and said, "I'm 90 years
old."