All you do is go to the site's homepage, click a button to sync your webcam, and you are instantly connected randomly with other users.
The roulette part comes in because if you don't want to chat with the person you are paired with, you just click Next and another person randomly appears.
Now, we face the worrying prospect that a growing number of men find it acceptable to expose themselves to strangers online - and the young girls watching them not only think it's normal, but some even agree to perform sex acts on themselves in return.
Just think of the way that Ashley Cole threw away his marriage to Cheryl Cole by texting naked photos of himself to a stranger, before embarking on an alleged affair with her.
On the screen in front of me are two small boxes - little video streams - one above the other. The face and bare torso of a man is in the one on top. The gimmick is the fact that all of the users have webcams - so they can 'meet' the random strangers.
('FAIR USE LAW' APPLIES TO ALL ARTICLES)Late on a weekday afternoon and I'm sitting at my computer. Users log on, press a big button labelled 'Next' and it then randomly connects you to any one of a number of people across the world currently logged on.
After my daughter first told me about it a few weeks ago, I decided to investigate the site for myself - and, even for a technophobe like me, the ease with which I was able to access it was terrifying.
Parents need to know that Chatroulette allows anyone with a webcam and Internet connection to instantly video chat with any other visitor anywhere in the world.
Even if you don't have a web cam, you can still use the site and view the other people using it.
Within the first few seconds of using the site, I was asked: 'Do you show boobs?
''If you don't like something, you just click "next",' my daughter blithely told me.