No clue, but it's like a parallel life, I guess. I can't really make sense of the why. I can only say that it will happen.
It isn't difficult, which is probably more surprising. I have seen myself as a vampire enough in them. I was a little off when I saw my first kill, and then I've kind of turned off that emotional core that says it's wrong. I'm a vampire. Vampires need blood, call it a survival thing. In this life though, as my human self, it's different.