In most western countries, the societal expectation of fidelity in a monogamous partnership lies between 60-100%. Although fidelity in a partnership seems to be very important to many people, various statistics and surveys show that many people still cheat.
Chronic apologizing for all sorts of things could be traced back to a social convention and thus indicate a social hierarchical problem. Others also apologize to keep social interactions between people friendly and helpful.
With the following behavioral patterns on your part, you may be better able to recognize a narcissist and thus be better prepared for what may come or walk away from them right then and there. There are some behaviors that don't sit well with a narcissist or even trigger fear in him..
Introversion and extraversion are two opposing personality traits related to socializing and social interactions, but are often misunderstood and misinterpreted.
Histrionic personality disorder and narcissistic personality disorder are similar. Here you can find out what these two personality disorders are and what the difference between them is.