I peed on my cat
What? Why did you do that?
I was trying to make it hate water
Rather than doing something so dramatic, you could consider talking to a vet if your cat has an obsession with water.
Its just a cat, I can do what I want.
Well, it is an abnormal behavior and not healthy for the cat.   If there is a practical reason to keep it from water, there are plenty of other ways to train it.