A fuck buddy is someone with whom you have sex without integrating them into your family and friends sphere. If anything you hide them from your intimates.
If you want to achieve success with online dating, you will need to educate yourself with the sex buddy scene. Hookup sites provide a service for people to meet but a fuck buddies site can only do so much of the work and input is required from you if you are serious about meeting a partner online.
Having regular and fulfilling sex is an amazing thing. All people would agree that sex is one of the most exciting and pleasurable activities one can have in life.