This briefing uses insight from Childline counselling sessions and NSPCC Helpline child welfare contacts to share information around young people engaging in harmful and problematic sexual behaviours. The briefing shares young people’s perspectives across the various stages of engaging in harmful and problematic sexual behaviours. This briefing is for everyone who works or volunteers with children and has a responsibility to keep them safe and this includes taking appropriate action to prevent and respond to problematic and harmful sexual behaviour displayed by a young person.