He hmms a little, looking back down at the tube in his hand.

"Well," he says slowly. "I did promise you something in exchange for cooperating with taking off your underwear. And honestly I expected more of a fight over the cuffs."

He considers for a moment longer, then shrugs and wipes the tube clean on the blanket.

"Maybe I'm getting a little ahead of myself. I have to save something for next time."

(He did have a back-up plan to use in the event that Tony didn't object, but he was fairly confident he wouldn't have to worry about it. That wonderful look of dawning alarm was all he was really after.

He'll even tell Tony as much later on.)