Yes I'm a guy which tend to switch to sandals almost whenever wearing shorts :). But I know sometimes, the right shoes with shorts can look very stylish as well. So that's why most of us wear sandals with shorts, we find shoes unfashionable? Personally the only reason is that I like the style of sandals I sport, but just that.

Wait you wrote "makeup for men" as a comparison for bad fashion choice, but hey I think makeup can look very cool and alternative.