Fashion, like art, is subjective. One person's yum is another person's yuck. Just because all these French fashion designers like something doesn't mean Johnny-On-the-Street will. We're just conditioned to think that because they "know" fashion, whatever is fashionable is good. And I'm assuming they're talking about the dress on the rack and not what she is wearing, right?
What about that wall of hair on the saleslady? It's beautiful. Much better than the dress.
I apologize for Brutus, you just look like every other woman who has worked at this diner and Brutus gets easily confused.
(Brutus really shouldn't be bragging about being a regular at this place.)