While subtle discrimination is really bad, how does she get from low cut dress to slut? That's surely something she came up with herself and nothing like that the guy intended. The guy certainly doesn't want her to wrap herself up in sweaters, why does she feel like that's how she should respond?

I feel like there's a huge gulf between second and third wave feminists. Modern ones would find the above comment empowering, you only react in this way if you've been brought up in a society and culture that demeans female sexuality and teaches you that low cut dresses implies slutiness and so on.