This dance is incredible. In order to win her back, Fred has to sweep her off her feet by dancing little tidbits they had danced earlier in the film. Her dress is incredible. His sincerity is heartbreaking. You literally can’t look away as they dance in a desperate struggle to stay together. What an amazing moment in a wonderful film. 

Reason #3 Why Swing Time is My Favorite:

This dance. His expressions. Her dress. The delicious sexual tension.