Hops:
I think you are absolutely right...I have never heard my Nmom or Nsis make a self-deprecating comment about themselves....However, on occasion I do see my Nmom making a comment that is intended to make others focus on them again. For instance, in a group of people, one woman might say to the other woman, "Wow, you look great...You really lost a lot of weight." My Nom would interject and say, "Oh, I really need to lose a couple of pounds." It is clear that she in no way needs to lose weight....She just wanted the attention on herself so the other women will say, "Oh, NO, you look great..You don't need to lose a single pound!"...But no self-deprecation at all. They are incapable of it.
However, I do agree that men who are Ns make attempts at humor which are just veiled insults, snide remarks and cruel attacks.
But I do think I've always had a good sense of humor...and am especially good at self-deprecating humor....But never to be cruel towards another. I think Hops is right...Taking a joke, makiing a joke....means thinking of others....and Ns are incapable of that.