Why is gastronomy better than pornography?

I posed this question (off-site, not during a session) to the bloggers (and John Nye) at the Liberty Fund conference on luxury I attended last week.  Both areas involve repetition, basic animal instincts, the quest for endless variations on something slightly but not very new, pleasures of the senses, and both fields attract a not-so-small number of obsessives.  Gastronomy has a more exalted social status, but perhaps that is just phoney-baloney.  Can you guess what the best answer to the query was?

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