Sexting is the act of sending sexually explicit messages or photos electronically, typically between mobile phones. It can be considered a form of cheating if you are in a committed relationship with someone, as it can be seen as a betrayal of trust. Sexting can also be dangerous, as once the image is sent, you have no control over where it ends up. The recipient could forward it on to others, or it could end up on the internet. If you are under 18, sending or receiving sexual images is classed as child pornography and is a criminal offence.