Desperation clawing at that rational mind the longer you go without feeding. Until you're nothing more than an animal, needing to be trained. And when they finally, finally let you have what you need... you suck on their fingers gratefully. Worshipping them. Begging for more.

Turning you into a vampire on purpose. We need a live specimen to study, you see. It's much easier to just turn someone in captivity than risk capturing one in the wild. Gloved hands inspecting your mouth, a thumb gently running along those fangs, so close and yet so far...