Smells better when turned on

Your cat may be trying to tell you that there’s something wrong. Get it checked for a UTI.

It could also be a sign that he doesn’t like the litter. I have a cat who refuses to step in the box on the litter, preferring to walk along and stand on the edge to potty. But definitely go to the vet. If it’s not a UTI, try using something different, whether it be a different brand or different type.

Cats love the smell of natural gas. It makes them want to pee to mark their territory

Definitely get a vet check. It's indicative of a uti

Yeah, he already knows that you accept that he owns the litter boxes you clean (because you're the low-status mammal in the house.)

He's just expanding his territory.