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A man every time he smokes, he always smokes 2 cigarettes at the same time

And then one of his friends asks "why do you always smoke two cigarettes at the same time?"

The man replies: "my brother is in prison, he told me to smoke a cigarette instead of him every time i smoke one for myself"

After some time his friend sees him smoking one cigarette and not two he becomes surprised and asks him "why is it? Has your brother been freed from prison?"

The man replies: "nah man, I myself quit smoking"