Bottoms
I find they're actually essential for most activities
( Invisible Wizard - 12th Level Errorer, Sat 4 Oct 2025, 7:30, archived)

Do you stick your brunch up your bottom then?

( Aardvark and so at last, I understood, Sat 4 Oct 2025, 12:28, archived)

Obvs
This is the trouble with being invisible, I can't see which of my body parts are which.
( Invisible Wizard - 12th Level Errorer, Sun 5 Oct 2025, 7:48, archived)