Just when I get off my high horse about Game Boy being two words (not one!), Kairon frustrates me again by making Scarface two words as well as Manhunt. >_<
I would be an English teacher, except I'd probably get fired after totally freaking out about some kid's misuse of "your" and "you're", or writing "should of" instead of "should've" or something like that.
I see M-rated games like sex. No individual person NEEDS sex to survive, but the species as a whole do. I don't think any particular Nintendo console NEEDS M-rated games, but overall, they should have some. I don't know if it's a matter of survivial, though.
Really, it's all for the image. With the exception of blips like GTA, the best-selling games have usually always been E-rated games. Say what you want about Pokémon and Yu-Gi-Oh!, but they make Nintendo and Konami a pretty penny.