Mmm, this was pure catnip for a Snarry humor fan! A very IC Snape and funny cat-Harry, along with an outrageous large cast of crack-ish other characters.
Your kinky pairings were so funny, although like Harry, I hope Hermione or someone can scrub out obliviate the memory of Narcissa pegging Lucius, and Voldie/Nagini/Bellatrix. Good thing we didn't see Bellatrix's 3some, too. *winces*
Love the Trio's animagus forms! And Draco's crush on Hermione - hee!