expecting the unexpected (слэш)

“You think it’s a side effect of the serum?” Steve asks, mouth full of curly fries. Bucky throws a ketchup packet at him, which only makes Steve kick him under the table. “Maybe you were ever so slightly lactose intolerant before, but the serum heightened it? Like all our other senses?”
“Pretty sure lactose intolerance isn’t a sense, buddy,” Bucky tells him with a roll of his eyes. He takes a long drink of his soy milk shake, which is actually much better than he’d thought possible before trying it for the first time. “‘Sides, I was eatin’ all kinds of shit while I was on the run an’ nothin’ ever bothered me much.”
Steve nods, thoughtful. Then, a little forlorn, “Cheese, though.”