Private Conversations and the Disclosure of Private Facts Tort

Eugene Volokh has a commentary on The Volokh Conspiracy that will likely surprise some people and inform:

Occasionally, I see assertions that disclosing certain private information about someone — for instance, details of their sex lives, medical history, or financial affairs — would be tortious, even if the disclosure is in a private conversation. (See, for instance, this comment, and this dissent from a Supreme Court opinion.)

But generally speaking, the disclosure of private facts tort does not apply to such private disclosures. (Of course, the disclosure might in some cases be a breach of a professional duty, such as that of a lawyer, a doctor, or a psychotherapist, or a breach of nondisclosure agreement; but those are different matters.)