Vampires Will Never Hurt Me...Right?

At night when you are sound asleep
Its time for me to dine
I thrust my fangs into you, deep
And drink your human wine

Its warm and thick, my deathly sin
Dripping from my lips
Down to stain your chalk-white skin
So smooth against my fingertips

Your veins are dry, I'll leave you here
With fang marks and a stain
In deep, unconscious, growing fear
And a heart that beats in vain