"How's your lip?" Sam ran his tongue over his bottom lip in response. Which Bucky didn't notice, because he hadn't been watching Sam's expression out the corner of his eye. "Kind of sore." He gave Bucky a small grin. "Is that why you were staring? Worried about my lip?" (Sam busted his lip. Bucky watches it heal. Any flirting that occurs in-between is negligible.)