If you read the fic (which actually, I *don't* recommend at this point cause it so definitely contains spoilers like WHOA) Ronon's expression makes a LOT more sense.

Did you get to read that other fic I sent, btw? Oh, also, if you did read it, warnings about poking around more on her site, I think there are some major spoilers just in the descriptions of some of her later fics, so...