Sure they do. I don't know what it is like to love and empathize. Sure I do. This is the human predicament. We are finite creatures in an infinitely varied world.
Narcissists are adept at imitating emotions.
If narcissistic supply can be obtained by imitating empathy, compassion, caring and understanding, the narcissist will immediately become THE most empathic, caring, compassionate and understanding person in the world. But he does not genuinely experience any of this. Of course, it is better to extract narcissistic supply from others by helping them, caring about them and empathizing with them, than by tormenting them or brutalizing them. It is a discovery I have made for myself. I implement this new found knowledge in this list.