monimastoduscephalia
From the Greek for "brain that's permanently in the shower," a very common behavioral syndrome characterized by the individual feeling comfortable to speak to themselves and even sing out-loud anywhere and everywhere at any time.
I have monimastoduscephalia. That’s why I sometimes talk to myself out loud and sing in the street.
Reading this out loud? You probably have it too. It’s fine. Nobody cares.
Reading this out loud? You probably have it too. It’s fine. Nobody cares.