Pretty sure Carmen is supposed to be a Cumpire. So yeah pretty stupid.
It's really stupid because Vampire's in myth already get power through sex, blood and in some cases psychically. So being a cumpire would be rather redundant. Also another thing about Vampires while they are technically undead, most are turned while they are still alive, so it wouldn't really count as necrophilia. If banging Vampires counts as necrophilia, then banging demons would as well, as in some myth demons don't have a beating heart, or can be corrupted spirits of people who have passed away. Essentially if the writers had established a coherent lore, most of these concerns would go away.
Edit: The problem with their use of myth is essentailly they took popular mythological creature and never established their own rules. This is the same problem every writer who is a huge Tolkien fan has, as they will go "they're Elves and behave like elves" to the audience, not realizing Elves work differently in other works of fiction, have different skill sets, and can be something completely different in another culture. Easy example Elves at the North Pole are completely different from Tolkiens or even the Dragon Age ones. Establishing lore is really important, and imo the fun part of writing.
