One brand of kink that I find ridiculously hot, but is really hard to find porn of or likeminded people around is couples being submissive together. Particularly being spanked together of course (me being a card-carrying #spanko).
Like a couple being run through their paces by an exacting dom. Or my favorite fantasy of the couple having lost a bet or settling a debt with another couple, nervously shaving and preparing themselves together before going over for a night of used holes and beaten asses. Oh, how delicious it sounds in my mind!
Am I the only one who finds this stuff stupidly hot? I find precious little porn and erotica on the subject, and I've never really gotten a reaction from anyone I've talked to about this so far (not a huge group, to be sure).