Why all of a sudden was I allowed to dance in front of the men? What kind of mitzvah could I get at the expense of doing something that is usually forbidden? I didn't understand, but I trusted the Rebbe.
The reason is that it is not a dance like any other dance. For one thing, the bride hardly moves. She just holds the gartel while the other end of the gartel is held by the one designated to dance with her. Her face is usually veiled. She stands in her veil and wedding gown like a luminous white vision. She knows that this is a good time for prayer like the time of Neilah on Yom Kippur, and her lips move behind the veil as she asks for a happy marriage, for children, a good life, and all the deepest prayers that are hidden in her heart.
The order of the dancers is significant: the uncles and brothers, the father-in-law, the father, and then last of all, the groom. A pathway to her new life is carefully laid as she dances with her father-in-law which gives way to the dance with the father who gives ultimate precedence to the groom who is the other half of her soul.
Here is the father taking his daughter's hands in his own and dancing with her, without the gartel in between them. They are allowed. This is after all his daughter. This is after all her father. The other dancers were close relations, but her father is much more. One's own child, one's own daughter. How to express the love they feel for each other now at the time when the nature of love becomes revealed?