LOL, I know a couple of people for whom rimming is a major squick (and contrariwise, a couple for whom it is a big kink). So I figure it's out there enough to put a warning, or advertisement, as the case may be.
And yes, I can tell you're all about the Snarry! *g* I do like Snarry, obviously, but I'm a multi-ship kind of person really, and like both Snape and Harry with other partners too.