We talk about that **** enough on this board. Younger members or not, if we have young'uns (yes, I said young'uns) in HJU, we're not gonna restrict anyone. They'll click regardless of warnings, be it 18+, All Girls only, or whatever.
In today's society, younger and younger children are learning things it took us years to know about. The problems and conflicts of the world, means of self-abuse such as suicide, drugs, and alcohol, and sexual themes that exist not just an unmoderated Internet, but in every bit of media, be it music, TV, games, etc., that they watch, everything now is exposed to them. It is not a parent's fault or anything, it's their own choice, even if they are given the freedom to or if they do it in secret.
So why do we need an "Adult Section" if we can't control who's in the forum? For all we know, there's a 12 year old here who's had sex and alcohol at his/her age and is still a mature thinker. If you want a place to talk about your own "adult themes" such as sexual habits and such, then do it at your own place and time outside of the public eye. There are things that we don't want or have to know about, so respect that.