you seem to like the 'rarer pairings' online - Sirius/Lucius? There's this one when Sirius gets tortured by Lucius, and there's this Stockholm Syndrome thing going on, and the torture is more physical/psychological rather than sexual. Lucius actually breaks Black in a way that left me stunned... but it's a mind fuck more than anything.

I don't know the link off-hand, but I can try and find it.