Actually, as I was checking VGcats just a minute ago, I saw another Ad claiming the game is 18+, which is really what led me to this topic lol
AO isn't my main (or any deciding factor) reason to look into the game, but it gets the curious feeling, especially since I've seen it advertised all over the place. Seems likely to be just a marketing ploy, like using scantily clad women and suggestive phrasing to entice lonely males.
Just saw an ad on YouTube saying, "NO CHILDREN ALLOWED!! Male Gamers Only."
This applied to me, so I excitedly clicked it--and was taken to a page chock full of nearly-nude hand-drawn women. I hurriedly closed the tab. Nowhere did they specify heterosexuality as a requirement as well... sob.