Yes, it's allowed, however, only if the question was already deemed "mature" at the start. Since people under age 18 aren't allowed to gamble or visit cas!nos...it does make a certain logical sense.
So if the question didn't start with a mature topic, you can't reply with one.
I was wondering the same thing. I know my status update went to the mature updates and I was pretty sure it was that word. I just tried answering with it and it says it's not.
Oooh, ty jeremy