What I need is only cross sex connection and interrelation in my site. So, In the Signup Form I will remove 'Looking For' section and that part should be automatically configured to opposite sex of Gender that filled by the user. So if the profile is Male, His desired sex (Looking for) should be Female and he should only be able to search, see and therefore connect Female profiles. And if the profile is Female, then vice versa.

I apreciate if someone give any kind of information about the subject. Also I think a developer should implement a plugin for this. I'm sure many people looking for such a feature.