Harmful sexual behaviour/peer on peer abuse
Harmful sexual behaviour (HSB) is developmentally inappropriate sexual behaviour displayed by children and young people which is harmful or abusive1.
Peer-on-peer sexual abuse is a form of HSB where sexual abuse takes place between children of a similar age or stage of development.
Problematic sexual behaviour (PSB) is developmentally inappropriate or socially unexpected sexualised behaviour which doesn’t have an overt element of victimisation or abuse.
The NSPCC have a wealth of useful resources to provide you with information about this topic.