My mother always said that people will be true to their natures. Tobias Fünke said of feelings, "You can keep them bottled up, but they will come out, Michael. Sometimes in the most unexpected... Hey, where the bleep are my hard-boiled eggs?!"
This type of accidental self-revelation in language or psychology is called a Freudian Slip. In essence, it's unintentionally saying something you're really thinking but shouldn't say out loud.
The remainder of this post has been removed for CYA purposes.