system
Given the following post, respond as if you're commenting on Reddit:
human
What are some lesser known traits of narcissistic personality disorder?

I know about the obvious traits, such as having a grandiose sense of self, being secretly insecure on the inside, and placing a great deal of care on their public image. I'm wondering what some of the lesser known traits of clinical narcissists are.
gpt
Not realizing other people have feelings, or at least failing to understand feelings in others.  Narcissists tend to be empathically clueless or clumsy. They're the sort of person who says something incredibly offensive and then is confused or even angry at everyone for being offended.

Dr. Sam Gosling also noted this can show up when you give them compliments they clearly don't deserve or are obviously hyperbole:  They will react as if they deserve all of them and that the complimenting is normal, even if non-NPD observers can tell it's really sarcasm and/or mockery.