[Inspired by a suggestion Thingy made in the comments on this post.  It kind of wound up being completely different than I expected when I started it.]

Of all the monsters men detest, one that stands above the rest

Is none other than the dreadful VAMPIRE!

By day a suave aristocrat, at night it turns into a bat;

Who can deny the fear that they  inspire?

But though frightful are these ghouls, they’re governed by some rules

That are overly complex and convoluted.

Bram’s well-publicized account of an evil, charming Count

In their mythology is deeply rooted.

Garlic is their kryptonite; put it ’round their crypts at night

And you’re safe from Dracula and from Carmilla.

When to destroy ’em it suffices to expose ’em to some spices–

Well, what happens if you feed ’em some vanilla?

And none of them appears in such surfaces as mirrors–

A property of theirs which is very unexpected;

Because it does not apply to the normal human eye

Into which their light is properly reflected.

If you’re writing vampire fiction, there’s a good deal of restriction

On the powers of your Nosferatu.

So, you’ll have to pick and choose from the rules you want to use–

Or at the very least, you sure ought to!

Where vampires are concerned, if there’s one thing I have learned

It’s that they can be whate’er you want.

They need not be tall and sleek, with a striking widow’s peak,

Nor need they be all pale and gaunt.

And if you think it’s queer that in mirrors they don’t appear

That’s a feature you can readily exclude.

They can go out in the light, have a normal appetite,

And just sit around a lot and brood.

Or again, if one desires,  they can make all their vampires

Behave like a roaming zombie horde.

Yes, there’s many ways of writing of these monsters so affrighting–

I just wish for one of which I wasn’t bored!