He pushes up onto the dresser and hooks his heels behind Midnighter's knees. "Yeah, here's the thing. I'm bossy but I'm not dominant. I'm definitely not sadistic. I am a masochist, but I don't think I'd enjoy thinking i made you do something. Unless you wanted to do it."

It's complicated, but also: "I turned into a masochist at least in part based on a couple of decades worth of terrible headache, though."

Is he telling the truth ? Yes.

Is he also being a deliberate kind of manipulative smart ass? Also yes.