What we have right here, ladies and germs, is some grade-A, top-notch crack.

Openly staring, chewing on the end of his pen, fingers pinched around the belly like he was dying for a fag.
Brilliant. I don't know why that stands out for me, but it's a marvelous description.

And I could quote the rest of the story, but I won't. :D But pretty much everything happening between Remus and Sirius just...burns. It's that smoldering.

Yeah. So a sexy little snippet.