The toilet seat is a detail of enormous erotic power to use as a symbol in scenes of bondage, humiliation and submission.
In my work it is used interchangeably by both dominant and submissive figures, although the latter are usually dedicated to a much tighter design to the face to highlight the intention of accepting backs in the most intimate and discreet way possible.
I don't think I invented this fetish, but for now it has taken me a lot to find references on the internet. So maybe this is why I will continue drawing much more about it