I thought that secondhand smoke was when a homeless person picked a cigarette butt up off the ground and relit it.
A childhood belief about smoking

others believed things like this
- I used to think that clouds were caused by cigarette smoke— Monkey Dave
- I used to believe that smoke stacks that pumped out white smoke were cloud makers.— lizzie
- I used to belive I was the only person with a buttcrack because I ripped my butt open as a baby— FC
- I thought ground beef was the meat they scraped off the ground at the slaughterhouse. Yuck.Anon
- Until I was about 12 years old I believed that homeless people were made up by my parents to scare me.— Angela B.
- I used to believe that if you smoked a cigarette while drinking an alcoholic beverage you would blow up!— Sue