When you go through puberty your sexual organs change. They begin to alter in a way that will let most people reproduce, or have children. They also become more sensitive and allow you to feel sexual pleasure.
It's natural to worry that there's something wrong with your sexual organs, or that they're too big or too small.
The truth is that people’s sexual organs are as varied as their faces. Being a good lover is not really down to having big genitals or pretty ones. It's more about your generosity and sensuality.
If you take some time to get to know your genitals then you'll be in a better position to realise when something really is wrong, and go and see your doctor
It's worth knowing what all the different parts are called and what they're for and that depends upon whether you are male or female.