If narcissism is increasing, this is ominous for the mental health of future generations. It's associated with a strong sense of entitlement, which leads to unhappiness, through a sense of deprivation. Narcissists can't have proper deeper relationships because they merely seek to exploit others for their own ends - friends and lovers are always stepping stones to something better.
It's an uncontrollable urge, a reflex action. No matter how hard you try, you can't help yourself. If you see a link to a picture on Twitter, you've just got to click it. What will it be? If it's a Sunday, the chances are your click is going to lead you to some eager naked flesh. Welcome to yet another sleazy reinvention of Twitter. It's Naked Sunday.