Yes.
If you play Vampire The Masquerade you have to understand what blood means to a vampire. It is their drug of choice, the means to extend their unnatural life, their rejuvenation and continued immortality. To a vampire is is their drug of choice, Its sex, drugs and rock N roll all rolled into one. No matter, how genial and good nature-ed a vampire is. They are still bound to it like a junkie needing their next fix. They will still tear you part if you get in the way.