When someone takes offense easily, the aphorism is that “they wear their emotions on their sleeve,” implying that their emotions are so near the surface that they are easily provoked. That provocation can come in any number of ways, for instance, a word, a facial expression, or even a touch can evoke a response seemingly out of proportion to the stimulus. People who wear their emotions on their sleeve are difficult to be around for any length of time because of the inevitability that something will eventually offend them and cause an emotional response.

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