Draconicon's Rule 34 Harem 3: A Purple Toy
Draconicon had made a number of the different fetish rings, each one containing a different sort of tweak for someone's mind.
EXTREMELY dirty socks, & the filth addicted catboy...
The catboy was part of a nasty foot fetish ring, & the requirement for alpha males getting in, was to wear the same shoes & socks every day, without changing or washing, for at least 1 year, just to get access to the kitten.