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As long as they do it in their own home I think it's their private decision to damage themselves. However, in public they should respect their non-smoking fellow human beings.

Yeah i'm totally agree with you.
Upvoted and restreem.

They smoke, because it´s addictive. Drugs fuck up your hormone balances and let you crave more and more of it. this is why rational reasons to not take a drug only work with people who were never or very rarely exposed to the drug.

it is sad :(