I have a theory that smoking often skips a generation because people as they become adults revolt against the status quo and don't want to be like their parents. Then the cycle repeats with their children rebelling by smoking. This is just anecdata though, would love to see a study on it.
But it's also interesting because my parents smoked cigarettes too. Cant stand them. Cigars are my thing, but cigarettes... nope. It's such a weird repulsion too. The whole childhood memory link stuff is so weird and inconsistent or perhaps more complicated than we imagine.