Teenage years are difficult at the best of times but a lack of experience in relationships and issues with self-confidence can mean young people feel they have nowhere to turn.
Many victims, as well as perpetrators, come from abusive homes themselves and therefore don't realise how wrong these kind of relationships are.
More top news
A ban on female soldiers fighting on the front line could be lifted in 2016, the Ministry of Defence has announced.
A woman who filmed her elderly mum's carer stealing money explained how she felt ill when she discovered the crime.
Showers are set to clear to leave much of England and Wales with plenty of sunshine.