Alright, so you know how sometimes when we eat food, little bubbles of air get trapped in our tummies? Well, when those bubbles try to escape, they make a funny sound that we call a "fart" or "toot". Some people think that sound is really funny and they like to make jokes about it. We call those types of jokes "flatulence humour". They might say things like "why did the toilet paper roll down the hill? To get away from the stinky fart!"
Now, it's important to remember that while some people find flatulence humour funny, other people might not. It's okay to have different senses of humour, and it's important to always be respectful of other people's feelings. So, while it's okay to make a fart joke every now and then, just make sure you're not hurting anyone's feelings or being mean.