Not really stressed but few other thoughts on this one.

I am creating a general directory ( all normal stuff here ), but i am also including an opt in Adults Only section / directory in the mix. This is not for porn but rather those good sites that deal in adult related subjects be they sex toys, chat rooms or even gambling etc.

This gives me 2 choices, one is i build the AO section as a separate stand alone and for better words that whole section would be adults only for those wishing to view that section, or return and view the general directory as its own separate section ( the choice of which one )

Or, i can with a little magic make it so that if you choose to view the adult sections that it ( if that option is selected ) will merge both directories into one combining both sections with both adult and general listing all in the one section.

? whats your call on it.