3 things my parents somehow made seem equally bad when I was growing up...

  1. Smoking
    Because lung cancer.
  2. Riding on a motercycle
    Because bodily harm from a terrible accident.
  3. Throwing books
    I don't remember ever throwing a book, but I remember thinking it was just about the worst thing you could do. I recall being shocked when I saw a kid throw one in elementary school and nobody seemed to notice.