I have a character who is a vampire and I am wondering if there is any justification for him being able to sleep. He is dead, doesn't need to eat or drink outside feeding off others, and all your other normal vampire things.. But what about sleep?
I thought of making the rules in this universe that vampires need to sleep every so often to recharge their energy, especially since they possess some super human abilities and thus expend more energy...but would that make sense if they are dead? Would their bodies need to recharge? Would they have energy to expend? For that matter would a dead body be able to generate more energy and would they even have any stamina to do anything?
Or do I just need to accept they are supernatural and vampires just do impossible things?