The article deals with the problem of a new trend in UK, which is to use mobile phone to film people having sex and then send the images to friends.
Firstly, the writer make a comparison to another trend in UK, the 'happy slapping". That consists to film assaults on members of the public and send the images to others too.
The recurring problem is that this trend is growing in UK and it's now a feature within young people's culture. Moreover, pornography images are easily available on internet and so, on mobile phone too. In this way, children become more and more desensitised to those images.
Then, the writer turns to a research made in Britain which proves that 90% of children between 10 and 19 owed a mobile with technological tools, as video or acces to internet. So, they can easily download and upload pornography videos or images. It creates a viscious spiral where adults have no control over who looks at it. Furthemore, sending those images is illegal and children probably don't know it.
To cut a long story short, the text points out that children make a complaint by saying they get too little sex education too late.