Okay, I thought the kink was really hot, although much more fun with Sirius than with the real fictional dogs. ;) But the thing I like best is that unlike a lot of Sirry stories, where both parties are pretty fucked up, in this one they really are on the same plane. Sirius is looking for someone to be happy with, and Harry doesn't *only* want sex with a dog, he wants Sirius, too.
". . . I'm a pervert; you're a libertine. It's perfect."