1. The scenery and clothes she wears onstage show such an innocence, a purity and hopefulness. Her song is charming and invites both the audience in front of her and in our viewing audience to "play with her"...to let leave cares behind and join in her lighthearted life. That she could be won over with the extravagance of flowers? Even the Bobbie at the opening of scene is cheery amongst the darkness of the foggy night.
2. Other depression era musicals would have this same lightheartedness. Who wants to pay money for what they have and can see in their own lives. "Forget your troubles, cmon get happy!" Themes would include fantasy sequences--good people winning, the "bad ones" losing (in love, in money, in happiness).
3. Pre-code, she wouldn't be a clothed, surely not in an "innocent shepherd girl" costume. The dashing men would be in her dressing room, trying to win her attention not just with flowers. Her song would have possible been more bawdy, not as sweet.
