Assume a world in which vampirism is totally unlike how it is usually portrayed in Bram Stoker's Dracula, Anne Rice novels, True Blood etc. Instead it's somewhat analogous to a disease where the victim's digestive system undergoes a transformation that enables it to digest only blood. The only other side effect is immortality (barring accidents, violence etc.). Creation of new vampires is done the usual way, i.e. by having a vampire drain them of their blood.
In such a world why would it be bad for vampires to create new ones from humans on the brink of death? I thought of two options:
- It somehow contaminates their own blood.
- It's taboo for some reason.
Any other reasons you can think of? Or something that could make my own ideas more interesting?