A figure in a hooded white robe wearing a Venetian mask appears before you. Next to him is a Dalek.
"This is Herbert-5741," he says. "He's a mutant of his species: he's not a psychopath, and has no intrinsic drive to exterminate anyone. In fact, he wants to have a friend. So I told him he can come live with you."
White Robe disappears. The Dalek remains.
"I am Herbert-5741," he says. "But you can call me Herbie."
So you now have a Dalek as your roommate.
What now?