Turns out there is a subreddit entirely devoted to pictures of chairs inside bodies of water. No jokes, not being tongue in cheek. That's literally all there is to it. They even have a dedicated NSFW tag for chairs that are Not Submerged Fully in Water. Not to kink shame anyone but this is definitely a new one...
Have a look inside, perhaps you'll find out you're one of them aquatic chair lovers. Whatever floats (or sinks) your boat (or chair).