Smoking tobacco used to be a completely mainstream activity. When I was in high school in the 90s, teachers had their own smoke-filled lounge. There was also an area of the campus known as the "gravel pit" where students were, at least unofficially, allowed to smoke.
In the 70s, it was hard to even convince people that tobacco could be dangerous, let alone attach a social stigma to the practice. Cigarette smoke carried an aroma of class and mystery. Weird Universe directs us to this print advertisement from 1972 offering people home water filters that would give tap water the taste of Tareyton brand cigarettes.
It's a completely real and quite prolific ad. You can see it in this issue of Life magazine.
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