Keyja.com is like a discotheque, but you don't dance with the women. You play with the women.
In the menu, you can access to the section "meet" of the program. There you can edit your personal data so that other people know who you are and what you want. You can also search other people by using the people search engine. It is very easy to use.
You are not forced to fill in your user details. And you can fill or erase whatever information you want, anytime you want.
About the users lists: You can bookmark users, add users as friend, and even ignore stupid users. Click someone's nickname if you want to do so. You can also see your users lists from the menu.
This functionality is only available to adults.