No such thing as stupid questions

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The original was posted on /r/nostupidquestions by /u/Pr1meAnxi3ty on 2023-10-01 21:47:53.

So im doing a short film for a movie, and one of the characters is supposed to be a smoker, ive read online that Herbal cigarettes are the best choice, and that if you draw the smoke into your mouth, and then breathe out through your nose, and THEN blow out through your mouth, you wont inhale any smoke. How safe is this? Is it truly a safe option or does it come with risks?

edit: short film for a class*