I put in other.
The reason is that I have some Vampire sims that don't care, but ask for permission to drink plasma, if the answer is no, they leave the Sim alone.
Some of my Vampires will drink plasma, but get embarrassed at being caught, even it they are given permission to do so.
While my other Vampires will stalk their prey, corner them, and then drink their plasma.
Finally, I have some Vampires who don't care about being seen, and drink the plasma regardless of permission or not. The Sims they target tend to have been rude to them some way, and they are getting back at them.
