It's only natural that you talk about sex with your pals, and you'll get some of your information that way. But some people don't quite tell the truth, and it's important that you know what's true and what's just a story.
Have a go at this quiz - it's really just a laugh. You may learn something you didn't already know. You can see all the right answers at the end. Remember you can also use the sex info in your area links to get further information if you need help or suppport.