Study: Most Teen Gamers Play M-Rated Titles | WIRED
Amazon.com: Your Mom Rated E For Everyone Sticker, Funny ESRB Decal, Rated M For Mature Shirt, Video Game Decals (H 8 By L 6 Inches, White) : Tools & Home Improvement
Entertainment Software Rating Board - Wikipedia
So, yeah. I'm having trouble understanding this whole "M" thing. - General Discussion - Giant Bomb