Personally, Any story or medium that combines vampires & sex annoys me. Vampires are undead creatures. They are essentially well preserved, high mental functioning zombies on a liquid diet. You need blood circulation & a working heartbeat to maintain an erection. So naturally, like any non living thing, When it comes to things like, say, popping a boner, it's like the post office on Sunday. No circulation. Yet in works like this, they still can cause "Plot armor".
& I mean, I get it. "It's fiction man, it's edgy vamp porn for the sooper edgy goth & Twilight fan crowd, suspension of disbelief maaaaannnn". Yeah, sure. But there's a limit. Unless the male vamp has his dick propped up with popcicle sticks & rubber bands, it's just a floppy bit of skin dangling in the wind.