>Pulcinella secret
Wasn't familiar with that term, so for others who also don't know it, here's a small explanation:
"Open secret – In various European languages, including at least Italian, French, Spanish, Polish, Russian, and Portuguese a 'Pulcinella's secret' or a 'Polichinelo's secret' is an open secret.
Italian psychoanalyst and philosopher Emilio Mordini has discussed Pulcinella secrets, arguing that they help people to retain their sanity in contexts where secrets are impossible (e.g., small villages, the online world). Mordini argues that Pulcinella secrets 'are not really secret in the sense that they are unknown or unknowable, but because they are labeled as secret'".
https://en.wikipedia.org/wiki/Pulcinella