The over 18 section is exactly that for over 18s.
Curiosity would have done, but, to get in you need to be known to be over 18 and have met a mod or a member known to a mod that can vouch for the fact that you are actually over 18.
This is to prevent and protect under 18s that may try to enter that section.
It isn't full of sex and violence, just the stuff that can't be discussed on the general site, such as sex and violence. This keeps, in theory the rest of the site child friendly.
