[While he allows his arm to be grabbed he doesn't move an inch as Porthos tries to pull him back - despite the fact that between the two of them, Porthos definitely looks to be the stronger - doesn't even turn to face him.]
It was the only way to make certain. [It probably wasn't, but why stop to analyze a situation when you can just muscle your way through it? He shakes his head, trying to clear it of the invasive feelings. These aren't his emotions; he has not failed Ciel. He'll get his missing memories back; as long as he's alive Sebastian has not failed him.]