seeing something you didn't expect to see
It's normal to feel curious about sex and to look online for information about it or to search for sexual things. Sometimes while you're online you may see pages or get lots of pop-ups with other things that you weren't expecting to see. Some things can be shocking to look at, for example, images which show child sexual abuse, violent sex or abuse.
There are lots of sites that have been made for young people to tell you everything you need to know about sex. You can have a look at the Childline pages on sex and relationships and try sites like Brook and the Terrence Higgins Trust.
Pop-ups or other pages about sex might also appear on your screen if someone else has searched for porn or sex on your computer.
It's important to remember you haven't done anything wrong.
Close pages or pop-ups, delete history and cookies on your computer and block these sites. Try to use anti-virus software and check your privacy settings too. Find out more about staying safe online.