sounds like a very interesting multi-person encounter!!!
be safe and have fun !!!
thinking about the root of the word to morph it...
so, if a vampire needs and sucks blood,
what's the word for a person that needs and sucks cum??
wikipedia's article on vampire doesnt have a good original meaning of the word, except for "thrust violently" or "someone who thrusts, bites".
http://en.wikipedia.org/wiki/Vampire#Etymology
dictionary.com says (probably a deverbal compound with *per- fly, rush) and (from Kazan Tatar ubyr "witch.")