You realize that the word narcissism is not fully encompassing of all aspects of the character in the tale that inspired the word though right?
The word describes self-centeredness on the shallow end and on the deep has a diagnostic aspect for a mental disorder that has nothing to do with sexuallity. Referring to asexual people as narcissistic for not being sexually attracted to people would be considered quite insulting. Look up the dictionary definition or the DSM for the disorder and show me where it mentions asexuality if you can.
Aw don’t be mean to Geoff! Dude can’t help being a bit backwards. His entire family died of plague and rooting for the 7th Crusade was maybe not great but it was a product of his time!
Just meet him on his terms you know? He likes board games. Challenge him to a game of Nine Men’s Morris and he’ll stop being such a downer.