To have a cat sleeping on the toilet seat would require the seat to be DOWN once in a while - which its not!

But we do have Pouncer that likes to sit in the sink basin. My husband can't shave because Pouncer's sitting there! Also, when my husband's sitting on his "throne" Allen will sit at the floor or jump onto the window sill and demand petting - I guess he figures that he has a captive audience!

We have a sign in our house that says "if you want the best seat in the house, move the cat." I guess this certainly would apply in your case!