What about vampires?

[Mr Bean]

Vampires?

When I show them the "Stake Shotgun" they tend to convert right back into oddly dress outsiders

[GrandMasterTerwynn]

If they did, it'd raise a few interesting questions.

Why can a vampire be bombarded with low-intensity solar radiation and immediately catch on fire, despite there being nowhere near the requisite amount of energy? Similarly, why can you theoretically direct a much higher-intensity beam of photons at a vampire and have it do nothing other than warm him up a bit?

If vampires' biological functions have ceased, why can they still have sex? Their hearts supposedly do not beat, so how can blood get to the penis to give a vampire an erection?

Does Freddie Prinze, Jr. know that Sarah Michelle Gellar spent all of last season nailing one?

And so on, and so on.

::Shrugs:: Ehhh, who knows? All I know is that if you stake a vampire through the heart and cut off their friggin' head, they get as dead as the rest of us . . . . though come to think of it, if you stake anybody through the heart and cut off their head, they'll wind up dead too...

[Joe]

Bloodsuckers exist. In Canada, we call them "Revenue Canada". In the United States, I believe they are referred to as the "Internal Revenue Service."

Nope. We call them the "Fucking IRS"

I prefer "Gestapo."

[Cpt. Marko Ramius]

You know, I bet you that some would say that they exist simply on the grounds that people have believed in them for so long, they must be real in some form or another. For example, the aforementioned "Anti-Vampire bullet" must have had some logical and practical foundation. Then again, for most of it's history, mankind has believed in creation and all sorts of higher entities. We've entered an age as a species where we're misproving or just not believing in things that were taken as everyday fact for hundreds if not thousands of years.

Sidebar: Not only did I just completely blow off answering the question, but I turned it into a damn theological discussion... I need a life.