What are the *simplest* animals capable of a disgust reaction? I assume apes are? cc:
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Don't put much credence in this, but I suspect that only humans have a disgust reaction/emotion/expression.
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Other animals will find things nauseating, but won't be rewarded for alerting their peers. They'll just move along.
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(IOW, what we usually think of as disgust — the "eww, gross!" reaction — is uniquely human... I suspect.)
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your prickly/squishy is connected somehow. Maybe prickly protects fragile leak boundary of active abstraction

