Evolution is the basic truth of our existence and our planet's. We have evolved so much from a unicellular organisms,then to chimpanzee and eventually our present form. Who knows after some thousand years we might evolve into something else who are totally asexual begins .. ha ha I m just kidding ,no need to get worried as if you gonna b alive till then.
New social sites should make people feel the need to use their service rather than entice them with let them connect to their friends coz there are many more easy ways to do just that.
"Successful business is all about making your customers understand why they need you and that you understand their needs better."