1. Astaire is quite reticent when he approaches her at the beginning, as if he knows the usual male social role is being challenged, not only by her clothing and attitude, but perhaps by that riding crop she is holding. He treads carefully, not sure how she will react.
2. The rain confines them to the gazebo, forcing them to deal with the situation. He is a bit uncomfortable, but trapped. Any recognition that women might claim equality to men is pretty rare in films of the era, so this an unusual departure from the norm. And she gets to dance in flats, not in limiting high heels (bet sh