Thanks. Depending on your tolerance for AUs that are a little, um, implausible, you might also like Hergerbabe's *Wolfbreed*, in which Lex gets turned into a sort of cross between a vampire and a werewolf. The fun thing about this story is that *Lex* gets to be the one with the inability to control his mating urge, for a change. That story is here: http://improper.amiss.org/wolfbreed.html