Why have so many people showing any kind of thing on the Internet?

many reasons are there i suppose. For money, some people can make money by posting these items. For fun and shre, soem people post the items they feel interesting and want to share with other people. To know outside world. When people are online they can know a lot of information they can't know just from their life. When they have enjoyed it they also want to let other people to know their world. Some people do it maybe just because they feel bored. Internet is really a time-killer.