The rapid development of the internet over the past few years has spawned a huge growth in online pornography.
With an estimated seven million sex sites worldwide, it's reaching nearly every home and office that has access to the internet. And now the numbers of men who are developing addictions to online sex is cause for concern. Writer Sean Thomas, who suffered from this addiction, and psychiatrist Mark Morris join Martha to talk about why such addictions can be dangerous. Tell us your views For more information call the BBC Actionline on 0800 044044
