When Bertram thinks he's merely practicing his speech to Sugarpuss on why he loves her, but she can hear every word.
Prof. Oddly remembering his wife, and the other professors singing "Oh Genevieve".
Sugarpuss telling Joe why she loves Bertram:
Sugarpuss: Yes, I love him. I love those hick shirts he wears with the boiled cuffs and the way he always has his vest buttoned wrong. Looks like a giraffe, and I love him. I love him because he's the kind of a guy that gets drunk on a glass of buttermilk, and I love the way he blushes right up over his ears. Love him because he doesn't know how to kiss, the jerk!
The final scene.
Bertram shyly asking Sugarpuss to kiss him again, being a big turning point of his uptight and reserved character.