A man was standing at the bus stop.
Suddenly he saw a very fit-looking old man.
He went to the old man,and said-

Man-'Sir,you look very fit. What's the secret of your looking so fit and young?'

Old man-'I smoke 30 cigars a day.
I drink 4-5 bottles of vodka daily,and I am a serious drug-addict.
And I hate doing exercise or Yoga.
Whenever I see someone going to gym or playground,I feel sick for them.

That's all I do'

Man(Extremely shocked and impressed)-'WOW Sir.That's unbelievable. By the way how old are you?'

Old man-'I will turn 21 this month'