“[Natasha Romanoff and Steve Rogers drive up to New Jersey pursuing a lead] Natasha: [about Natasha kissing him] Was that your first kiss since 1945? Steve: That bad huh? Natasha: I didn't say it was bad. Steve: Well, it kinda sounded like that. Natasha: No, I was just wondering. Steve: That was not…”
— Christopher Markus, Stephen McFeely, Natasha Romanoff / Black Widow, Scarlett Johansson, imdb.com