Hey kiddo, do you like playing with toys that are all yours? Would you like if someone took your toy and added it to a big pile of toys that everyone else can play with? No? That's how commingling works.
When grown-ups work with money and stuff, they can't just mix everything together like they would with toys. For example, you put your allowance money in your piggy bank, right? That's your money and you only use it for things you want. Well, grown-ups have to keep things separate too when they're working with money.
Commingling is when someone takes money or other property that belongs to different people, and they put it all together in one place. This might seem like a good idea to them, so they can keep everything organized in one spot. But the problem is that it can be hard to tell who owns what when it's all mixed up like this.
Just like with toys, people have their own things and they want to make sure they can use them the way they want. When someone commingles things that belong to different people, it can cause confusion, arguments or even legal issues. So, it's important to keep things separate and to make sure everyone knows what's theirs so they can use it properly.