[Yes, please control those inconvenient emotional hangups. Sebastian has learned not to touch Ciel when he has these reactions - Sebastian can guess what's triggering about the message - but if Ciel initiates the contact, Sebastian will follow his lead.
He turns enough to face Ciel, and reaches to take hold of his free arm. Holding it up. Feel that? Steady. Here.]
A person's soul might be separated from their body. It would cost that person their life.
Such a person would not have a demon to call their own. [Sebastian would know. He wouldn't allow it. Never in the history of mankind has a more comforting statement been uttered.]