To me this is a clear experience of a trait so important for us dancers when we are synchronizing our movements to music and to our partner’s movements. The lack of synchronization creates a negative feeling, feeling of distress and in that way driving us to a more accurate dance. On contrary when the fit is good enough there is the corresponding positive feeling!
During the first years I observed this need and feeling only on my own movements but one day I got a similar reaction while watching an old milonguero performing on video. There were sequences which activated a similar feeling as I had earlier had for my own steps and I realized that this old milonguero was synchronizing his steps to music in a similar way as I tried to do.
Most teachers allow us to film the class summaries, which I edit to a private video for learning purposes. In one video the milonguero couple danced relaxed and gave me a deep timing-feeling in my body during the different sequences with one exception. Later on I noticed that he started to sing during that one and suddenly I understood that we shared the out of timing feeling. By singing he wanted to emphasize the music to aid the synchronizing process. This was the only part of the video he was singing and this was the only part I did not get the timing-feeling in my body.
I think the best synchronization is achieved when you know the music by heart and you know your steps by heart. If you add a favorite partner you have released a lot of your mental resources for a relaxed dance and the chances to beautiful relationship with the music and steps are there for sure!
I am also sure that this need to synchronize our movements with others and with sounds is in every individual and by training this need and feeling are growing more clear and stronger helping us to improve our dance.