Porn addiction: 10% of 12-13 year olds worried about habits
One in ten children between the ages of 12 and 13 are worried that they are "addicted" to watching pornography.
One in five members of the same age group think watching explicit content is normal, according to a study by children's charity NSPCC.
The charity has launched a campaign to give advice to young people about the potentially harmful effects of watching adult material.
Sima Kotecha reports.