Narcissists aren't necessarily on the hunt for partners who are already in a relationship - but that doesn't appear to stand in their way. Narcissism is marked by selfishness, arrogance, an inflated sense of self and extroversion. They believe they're special, unique and entitled

See the source article by following the link below:
Narcissists aren't necessarily on the hunt for partners who are already in a relationship - but that doesn't appear to stand in their way. Narcissism is marked by selfishness, arrogance, an inflated sense of self and extroversion. They believe they're special, unique and entitled