system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:Why can movies and games that's rated R and rated M be bought buy 17 years of age? What makes 17 so special, where tobacco and marriage comes at age 18?
gpt
Honestly it's really just an arbitrary number to prevent the majority of  young people from being exposed to negative influences at a very young age. There's nothing 'special' about the age of 17, just it's generally accepted that at that age you're mature enough to understand the difference between games and film and reality.