Hehehe, I see "that look" on my DH's face sometimes and I can tell he's wondering why on earth I need MORE fabric, but he doesn't say a word unless it's to point out a fabric or two that he particularly likes, and sometimes it's just to say something like, "Did you see they have a clearance rack?".
He's a very smart man! LOL
He doesn't go to the fabric stores with me unless we're on vacation and stopping in somewhere on the road, though. He's wonderful and would go with me to the local shops if I asked him to, but I don't need to torture the man! He'll come along if I'm buying fabrics to make a gift for someone in his family and he'll help me pick things out for them, but otherwise it's my thing and I'm totally OK with that. It's too bad he's not into it, though, he has a REALLY good eye for color.