Two fifths of girls aged between 13 and 17 have been forced into sexual behaviour according to new research.
University of Bristol’s School for Policy Studies surveyed 1,001 teenagers in England, also looked at incidents and attitudes to abuse through school-based questionnaires to 3,500 young people in Norway, Bulgaria, Cyprus and Italy.
The coercion ranged from rape to being forced to go further than they felt comfortable with. A fifth of girls had suffered violence from a boyfriend.
The number of girls sharing sexual images with their partners was also higher in England, although researchers found that many girls viewed this as a positive experience and part of their growing relationship.
This changed for girls if those images were shared by their partner with other people. Boys were less concerned if their sexual images were shared outside of the relationship.
Meanwhile, the researchers also found many young boys had watched porn and had negative attitudes to women.
Around 39% of boys surveyed in England admitted they regularly watched pornography and around one in five, 18%, strongly agreed with statements such as, "It is sometimes acceptable for a man to hit a woman if she has been unfaithful" or "Women lead men on sexually and then complain about the attention they get".
The research, funded by the European Commission, has prompted children's charity the NSPCC to call on the Government for action to ensure teenagers understand healthy relationships.
Help for adults concerned about a child, call the NSPCC on 0808 800 5000
Help for children and young people, call ChildLine on 0800 1111