Ironically... As a non-adult, I approve of this message. Mature games are getting a lot of attention, just think of that game Hatred, while it isn't a mobile game it actually ended up being quite a good project for the developers. (It was so dull and boring, though.)
And just think of all the mature movies! 300 was a success and a more recent example, Deadpool!
Also Google Play has guidelines on these things:https://support.google.com/googleplay/android-developer/answer/188189?hl=en&ref_topic=2364761
And here's a more of a checklist:https://play.google.com/about/developer-content-policy.html
Obviously we're talking about games that depict mature content, but not in an illegal/criminal way.
(Was a bit scary seeing this post vanish for like 10 minutes)