Something about the way she said it, 'a Steve and Bucky relationship' made him think that it might not be a bad thing to have someone who was friends with both of them. He didn't know quite how this could be useful. He just felt like it could be. Someone to give him an outsiders perspective of his best friend. Sometimes he felt like Steve exaggerated his well being to prevent Bucky from worrying.
"If you ever feel like you need to taser me, be my guest," he said. He knew if he was behaving in a threatening manner then something had probably gone terribly wrong with the world.
He started thinking about the fireworks thing coming up, wondering why Steve thought loud noises would freak him out. He took a swig of beer and a bite of pizza.