Modern online dating serves represent some kind of thematic social network.
In this social network, as in every other, user has all the different demands you can imagine.
g., he can create a profile and view profiles of other users, but he cannot contact them).
The system works in such way that all users may register a free account with the aim to become familiar with the site and access the data of potential mates.
The most demanding people can require taking a personality compatibility test.