Steve could recognize that Clint and Bucky were making an attempt to explain this whole situation, but so far he really wasn't following. Well - Bucky was doing a slightly better job than Clint was, but in the end, that wasn't what got Steve to come closer, to stop hovering in the doorway with a disapproving frown. It was the fact that Clint was laughing - giggling, really - and Bucky was grinning, the kind Steve hadn't seen since they were kids. Of course, it was the kind of grin that existed only to poke fun at Steve (and Clint's nickname for him, apparently), but Steve couldn't be upset by that. The exasperated look he shot Bucky in return was solely for effect, and because Bucky would expect it from him.
"Yeah, I remember the Arena opening," Steve said, crossing over to them, but not sitting down quite yet. "But the stuff I had made me feel good, too, that was the problem. You're sure this isn't that? And what about side effects? Do you even know what this shit might do to you?" He was hesitant to jump on board with this, but it was so nice to see Clint and Bucky this light and easy, and even if Steve didn't feel a particular need to get out of his own head, he wasn't sure he wanted to be left out of this.
It helped, too, to know that Peggy had gotten it for him, because surely she would have investigated it a little bit. She wouldn't have sent him anything that was dangerous.
"I'm still not calling your cat a cow," Steve said firmly, but he took the spot they'd cleared for him, Bucky one one side, Clint on the other. And then he took the tea cup Bucky kept waving in his direction, eyeing the liquid inside a bit dubiously. You're sure this is safe? he wanted to ask, but neither Clint nor Bucky would ever hurt him, of that he was certain. If he couldn't trust them, then who the hell could he trust? And this was a small enough thing to grant them, when they both so clearly wanted him to join in.
So he knocked back a gulp of the drink, which tasted just like tea and nothing else, then looked at Bucky curiously. "How much should I drink? And how long til it kicks in?"