Social networking websites

Social networking websites are a hot topic among today's teenagers. Usually, the most popular one is Facebook, it's purpose is stalking and sharing your life. There's twitter, in which you share your life with strangers in less than 140 characters. There used to be MySpace, but it turned into dust when Facebook got wildly popular. And last but not least, there's Tumblr which is a site for sharing your inner self through text, pictures and video (literature and art). They all have one key quality in common, it's all about sharing.