An armpit fetish is where an individual finds armpits arousing, usually pertaining to scent. Regarding BDSM, a submissive with an armpit fetish could be forced to smell or lick the dominant's armpit, or to have their face smothered with the armpit.
I often have a very strong armpit odor, which has been known to intoxicate slaves with an armpit fetish, and I love using My scent to drive men wild. I also love using My armpits to humiliate slaves by shoving their face in them and forcing worship.
To worship My perfect armpits, apply for a session.