system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Since it's illegal for children to purchase cigarettes, why isn't forcing 2nd hand smoke on them also illegal?

Specifically in the home,  
where they have no choice but to breathe it in.
gpt
It's not illegal for children to buy cigarettes. It's illegal for shops to sell cigarettes to children. In other words, you can't make money off of children consuming tobacco.The difference there kind of defeats the parallel you were drawing.