Okay, a slight misstep, because Bull's first gut instinct is to reach out and stroke, but he can keep his hands to himself. His expression is... more serious than it has been during their time together. "Like I said, you want me to mark you up? Give you a little pain you can feel tomorrow? I can do that. I won't break skin or mark you anywhere I could cause serious damage. And if you need me to stop for any reason, if I give you the wrong kind of pain, you say Katoh. Means stop in my tongue, it'll get my attention faster."

He lets the smile come back a little with a tilt of his head. "Questions?"