Why does my cat sleep on the toilet?

Ever since I moved into my new apartment, one of my cats likes to take naps on the toilet. Which is adorable, but also inconvenient – I’m always disturbing her and having to scoot her off it. Despite the number of times a day I do this, she still likes to nap there. Is this a common place for cats to take naps? Or is she just a little weirdo?