florahart is absolutely brilliant: not one, but fivepervy limericks! Pairings range from Harry/Ron to Lucius/McNair to Draco/Buckbeak; all are wonderfully written.
Written by the marvelous icarusancalion, this is a "HP/SS gen" drabble. (I suppose I'll double-file it.) It's a wonderful take on the old "X and Y are locked up together" plot, and their answer is priceless. :D