Okay, kiddo, let me tell you a story about Brown v. Buhman. Let's say you really love ice cream and you always go to your favorite ice cream shop to get it. But there's a rule that says only blue-eyed kids can have ice cream. But you have brown eyes! That's not fair, right?
Well, this is similar to what happened in Brown v. Buhman. Some people really love having more than one spouse at the same time. This is called polygamy. But in Utah, there was a law that said it's only okay for one man to have one wife, not two or more wives. This law made it hard for people who wanted to have more than one spouse to be happy and live the way they wanted to.
So they decided to go to court and fight the law. They said this law was like the ice cream rule. It was unfair and not right. They wanted the law to be changed so they could have multiple spouses if they wished. This case went all the way up to the Supreme Court (which is like the ultimate judge for this kind of thing).
After hearing both sides, the Supreme Court said that the law against polygamy in Utah was okay, and it was not like the ice cream rule. The Court said that even though people have the right to choose how they want to live, having multiple spouses at the same time is not okay because it can harm others and lead to problems. So the law stayed the same for now.
I hope that makes sense, kiddo!