Bear with me here, because this admittedly sounds nutty, but I had a dream last night in which I distinctly recall (accurately) typing the master password for my password manager into a (dream) computer. To my horror, the password displayed in cleartext in my dream (it was a true nightmare).
Upon waking, I got to thinking, "what sort of human vulnerabilities do we have while unconscious or dreaming?" What if I spoke my master password out loud while sleeping? Are there any other unconscious ways in which we could disclose secrets that only we are privy to?
(Maybe this is better suited for the biology stackexchange? I figured I'd ask here first since the heart of the question is really regarding security)