Steve is surprisingly speechless as he watches Bucky pull his clothes off. He lifts his hips to help but more or less on autopilot since he didn't know what to do otherwise. Nor after. "Maybe four," he says, mouth feeling numb as he thinks about where this is going. His mouth is dry and agape as he looks down at Bucky and tries to get his heart low enough that he's not about to have a heart attack. Would the sap cause him to do that? Who knew on this planet. Either way, not a thing to risk.

"I...you know. I know a bit of what I like." He doesn't. It probably shows to someone like Bucky who has a better grasp on his own desires. Steve knows that he likes girls and that he, apparently, also likes some men. He knows that he likes the feeling of being touched and that he likes Bucky being just as strong as he is. Likes it even better when he's taller than him, for reasons he will need to contemplate when he has better control of that bloodflow. The rest? The rest is assumptions. Assumptions that he is apparently going to be able to test.

"I like you," he says lamely. What else is there to say when you're about to be given a suckjob?