Why are there removable toilet seats?

Ew never put a toilet seat iin a dishwasher. Its removable in the sense you can replace it or take to a utility sink if it needs a deep clean

The idea is to allow the easy removal of the seat, without actually unbolting it, to make it easier to clean the top of the toilet stool. Unfortunately, the latching connector on each side remains in place, and is itself a crud collector. The things are also just a bit more tedious to install in the first place.

I've sold Mayfairs with this feature for years, but personally prefer a simple bolt-down unit to the "easy clean" types, rarely removed anyway. The other thing, just a tradition with me, is, when a fill valve needs to be replaced, I may go ahead and replace the flapper, the tank bolts, and the toilet seat as well.

All toilet seats are removable

They're removable so they can be replaced when they need to be! A permanently fixed toilet seat would not be a great idea if it breaks or chips or gets uncomfortable to use--and you would need to remove it so you could replace it with a new one!

To make cleaning the toilet easier

For when you GO on a vacation.

Beacuse not all people sit down while they pee.