Haha, I must admit, I was pretty upset when I saw the actors for Sirius and Remus. I think the worst thing about Gary Oldman is the fact that he's quite shorter than David Thewlis? I mean, come on! He was described as TALL in the books.

And I think Sirius is the one who's sexually adventurous, too. Doesn't matter who's topping. It's probably Sirius's idea, in my book. :P