Dyspareunia is when having sex hurts or feels uncomfortable for a person. Imagine if your tummy was hurting after you ate something that didn't agree with you, but instead of your tummy, it's down there where you go pee-pee. Sometimes it happens because the body isn't ready or there might be an infection, but it's important to talk to a grown-up you trust or a doctor if sex is hurting you. They can help make it feel better so you can enjoy your body and feel good when you have sex.