Okay kiddo, so you know how people have different rules they follow about what they think is okay to do sexually and what's not okay? That's what we call "sexual norms." It's like a big list of things that we think are right or wrong when it comes to sexy stuff.
Some people believe that it's only okay to have sex if you're married, while others think it's okay as long as you're safe and consensual. Some people believe that it's not okay to have sex with someone of the same gender, while others think that love is love and it doesn't matter who you love.
There are all sorts of different sexual norms out there, and sometimes people disagree about what's okay and what's not. But it's important to remember that everyone has the right to make their own choices about their body and what they do with it, as long as they're not hurting anyone else. So always be respectful of other people's choices, even if they're different from yours!