It's rude to expose non-smokers to secondhand smoke.
Janice is a smoker who has four young children living with her.
Janice wants to have a cigarette.
Janice goes outside to smoke, making sure her kids are in the house when she does so.
Janice smokes in the living room while her kids are watching TV.
Janice's children are never exposed to the cigarette smoke and grow up without respiratory issues.
Janice's kids inhale the smoke and grow up to have asthma and other respiratory issues.