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3.7 Harmful Sexual Behaviour

See the Brook Traffic Light Tool for more information on distinguishing between 'normal' age-appropriate behaviour and behaviour which causes concern.



NSPCC Harmful Sexual Behaviour Framework: “Sexual behaviours expressed by children and young people under the age of 18 years old that are developmentally inappropriate, may be harmful towards self or others, or be abusive towards another child, young person or adult.”

It is also useful to distinguish between problematic and abusive sexual behaviours:

  • Problematic sexual behaviours: Problematic behaviours don’t include overt victimisation of others but are developmentally disruptive and can cause distress, rejection or increase victimisation of the child displaying the behaviour. Sexual behaviour problems are defined as behaviours involving sexual body parts that are developmentally inappropriate or potentially harmful to the child or others. They range from problematic self-stimulation and nonintrusive behaviours, to sexual interactions with other children that include more explicit behaviours than sex play, and aggressive sexual behaviours.
  • Abusive sexual behaviours: Abusive behaviours involve an element of coercion or manipulation and a power imbalance that means the victim cannot give informed consent, and where the behaviour has potential to cause physical or emotional harm. Power imbalance may be due to age, intellectual ability, race or physical strength. Abusive sexual behaviour may or may not have resulted in a criminal conviction or prosecution. Such behaviours are more commonly associated with young people over the age of criminal responsibility or those in puberty.

Technology assisted harmful sexual behaviour is sexualised behaviour which children or young people engage in using the internet or technology such as mobile phones. It encompasses a range of behaviours including viewing pornography (including extreme pornography or viewing indecent images of children) and sexting (Hollis and Belton, 2017).

Signs and indicators

Children and young people demonstrate a range of sexual behaviours as they grow up, and this is not always harmful. Sexualised behaviour is often seen as a continuum with five stages:

  • appropriate – the type of sexual behaviour that is considered 'appropriate' for a particular child depends on their age and level of development
  • inappropriate – this may be displayed in isolated incidents, but is generally consensual and acceptable within a peer group
  • problematic – this may be socially unexpected, developmentally unusual, and impulsive, but have no element of victimisation
  • abusive – this often involves manipulation, coercion, or lack of consent
  • violent – this is very intrusive and may have an element of sadism (Hackett, 2010).

A child's behaviour can change depending on the circumstances they are in, and sexual behaviour can move in either direction along the continuum. So it's important not to label all of a child's behaviour as belonging to one category.

The  Brook Traffic Light tool categorises behaviours as green, amber or red, so that professionals across different agencies can work to the same standardised criteria when making decisions and can protect children and young people with a unified approach.

Responding to harmful sexual behaviour

Concerns about the behaviour and safety of the children should be referred to Children social care, in line with the Referrals Procedure.

Responses to children and young people’s HSB should reflect the level of risk and need they present, and should be at the least intrusive level required to effectively address the behaviours presented.

An evidence-informed framework for children and young people displaying harmful sexual behaviours provides a coordinated, systematic and evidence-based approach to recognising and responding to the risks and needs of children displaying harmful sexual behaviour. It sets out a continum of responses.

Assessment, support and treatment

Effective assessment should be multi-agency, child-focused and consider the unmet needs of the child, the underlying reasons or triggers for the behaviour, protective factors and strengths, and what can be done to reduce the HSB. This assessment will ensure the right level of response by services.

If the identified behaviour is not subject to prosecution (this may be the outcome in regard to learning disabled young people or where diversion therapy is offered), multi-agency assessment and planning with a view to appropriate treatment and placement remains essential as a preventive measure to both protect the young person themselves and to safeguard others.

In cases which involved the justice system, a structured needs assessment should be carried out to ensure that the correct decision is made and effective intervention pathways are identified. Some young people may need specialist input (residential educational / therapeutic).

Further information

This page is correct as printed on Wednesday 18th of May 2022 05:21:00 PM please refer back to this website ( for updates.