Okay, so imagine you really like to eat cookies. Every time you eat a cookie, you feel happy because it tastes good. But what if someone gives you a cookie that tastes really bad? You probably won't want to eat it again, right? That's what aversive means - it's when something is unpleasant or uncomfortable.
Now, let's say you're a dog and your owner wants to teach you not to bark too much. They might use an aversive case, which is something like a spray bottle that spritzes water when you bark. It's not harmful or painful, but it's unpleasant and makes you want to stop barking.
So, when you bark and get sprayed with water, you learn that barking is unpleasant and you don't want to do it anymore. This is called conditioning - when you learn what to do or not do based on the consequences of your actions.
Some people believe aversive cases are effective in training animals, but others think it's cruel to use something that's meant to make the animal uncomfortable or scared. It's important to remember that animals can't speak for themselves, so we need to be respectful and compassionate when training them.