Claire Lilley, policy advisor at NSPCC, said: “It’s natural for children to become curious about puberty and sex. If they are not learning what they need to at school or at home they will turn elsewhere, including to porn. What pornography teaches boys is that girls are for sexual gratification, whilst girls feel they have to look and perform like ‘porn stars’ to be liked and valued by boys. This makes children vulnerable to being forced or pressured into behaving sexually.”