As far as unexpected romantic pairings in sitcoms go, Kif and Amy are a stroke of genius. Prior to season 3’s “Amazon Women in the Mood,” both characters had fairly minor roles in the series. It’d had been established that Amy was fun and easygoing, but men never seemed interested in her personality, nor did they have any plans for any kind of long-term commitment. Meanwhile, Kif’s been established as someone lacking in confidence, who would never in a million years believe that a girl like Amy would go out with a guy like him.
The episode where they get together originally seems like it’ll follow the show’s established pattern of kicking Kif while he’s down; he manages to get a date with Amy, but Zapp ruins it by pressuring Kif to use his terrible pick-up lines instead of bothering to make a regular conversation. It’s easy to imagine a version of this episode where Kif blows it entirely, and his feelings for Amy are never mentioned again. Instead, Kif saves the day, learns to ignore Zapp’s dating advice, and summons the courage to confess his love for her.
It’s with this relationship that both Kif and Amy really start to grow as characters. Just as Kif’s pregnancy brings out a serious side to Amy, Amy’s adventurous nature pushes Kif to be more assertive. He wins the approval of Amy’s parents (sort of) in season 4’s “Where the Buggalo Roam,” punches Zapp in the 2008 movie “The Beast With a Billion Backs,” and even disobeys Zapp’s direct order in the 2009 movie, “Into the Wild Green Yonder.”