Wearables on outfits are harmless unless butchered. While it is true that in real life we wouldn’t wear a pair of bunny ears around, the wearables we wear with our outfits often expresses what we want our whole ensemble to convey. You could think of it as a figure of speech of fashion. Your outfits are made by a certain theme, which is connected to your personality, which is the base of your interests.
PERSONALITY -> INTERESTS -> THEME = OUTFIT
Figurative speech is handy in literature to further explain to the reader what the writer wants the reader to see, hear and feel. Likewise, you could also think of your outfit as an open book of literature, and the wearables you wear are the metaphors and similes of your book. They can also drop subtle hidden messages that shows your TRUE SELF.