Toilet Seat

Why are there so many toilet seats in the ocean?
There are over 452,000 toilet seats in the ocean.
Actually, I just made that up.
But there are always toilet seats being picked up in fisherman nets in movies.
Why?
How often have you detached a toilet seat?
How often have you disposed of it by flinging it into the ocean?
Boots are always showing up in fisherman's nets too.
Boots I can understand.
At least a lot more than I can understand toilet seats.
Are people living closer to large bodies of water more apt to detach toilet seats from the base?
And are they concurrently more apt to be anti-environment by casually tossing them into a lake or an ocean?
We need to get to the bottom of this.
We need to commission a study.
We need to form a task force.
Why are there so many toilet seats in the ocean?