The narcissistic stare has been experienced by many of us who have had the misfortune to associate with Ns. Presumably, not every N does The Stare but from all reports, a significant majority does. The N’s stare is piercing, unwavering, reptilian. Seemingly flattering, this stare is unnerving – and is meant to be unnerving.
The Ns look right through you. A woman who is not familiar with Ns might think he is simply paying complete and rapt attention to her but he is not. The Ns are staring at you to see how vulnerable you are. Some believe that the Ns use their stare to look through you to your soul for the sole purpose of determining whether you are viable prey or not.
Once you are in a relationship with an N, they stare at you in order to control you. Their withering glare is meant to cow you into submission. It is a strong woman indeed who does not back down under the malevolent narcissistic stare. SOURCE