system
Given the following post, respond as if you're commenting on Reddit:
human
[Buffy The Vampire Slayer] Why do so many vampires seem to know karate?

It seems like every other vampire Buffy fights is trained in martial arts. Does it just come with being a vampire or do they train for it?
gpt
A vampire is just a specific type of demon inhabiting a dead person's body.  Siring is how these demons procreate: when someone gets turned, they get killed and a new demon gets to live in their body.  The demon has all the dead person's memories, most of their personality, and in some cases *it actually thinks that it is the person who used to own the body,* but it is definitely a separate entity.

The demons that create vampires are good at martial arts.