whenever i go to the bathroom and only the bathroom, my cat leo shuts my room door from the inside, throws my towel on the ground and starts screaming his head off

this has been going for about 4 years now and still happens if i don't remember to lock my room before going to the bathroom

any ideas?

Is he trying to tell you that you need to take a shower/bath? LOL. Or maybe he wants to take a shower/bath? Cats can have interesting quirks. This sounds like one of them. Leo obviously wants something.

Cats generally do a great job of keeping themselves clean! I wouldn't bathe a kitty cat unless there was a reason to bathe it. My Raiden spends a lot of time grooming himself and he smells soooo good!! I could sniff him all day long. He's not into water that much, so bathing him would be a chore -- and he does the best job himself.