I always thought vampires were the stuff of legend, but after doing a little digging through the scientific literature, now I'm not so sure. If you yourself have never heard of Renfield's Syndrome, don't worry. You're not alone.
Watch the video above or click below to read all about clinical vampirism. And don't forget to leave your thoughts in the comment section at the bottom of the page. Don't be afraid, talk nerdy to me!
ALSO ON HUFFPOST:
The Huffington Post’s Weird News email delivers unbelievably strange, yet absolutely true news once a week straight to your inbox. Learn more