Various body parts, including the head, the arms and hands, the torso, the hips, and the legs, play different roles in tango. Dancers need to understand the functions of each body part and properly allocate the attention, so that they can use their body in a controlled and coordinate fashion in the dance. Incorrect use of the body parts is a common problem in tango.
The woman's head may rest on the man's temple, cheek, or chin in the embrace according to her height. It's fine if she chooses not to do so, but most women like that relaxed feeling. The touch of the heads is a sign of intimacy, thus should be gentle without force. Some women use their head to prop against the man's head in order to avoid the chest contact. Beginners tend to draw support from the head when they are in action. Such practices reflect a misunderstanding of the function of the head, which is for intimacy, not for keeping a distance or assisting the movement. The touch of the head should be light and gentle. Dancers need to dissociate the head from the body and avoid using it subconsciously to support the actions of the body, as which is uncomfortable.
The function of the arms and hands is more complex. Arms and hands can be used to hold each other to form a warm, intimate and comfortable embrace. They can also be used to support, protect and sooth the partner. These are the correct usages of the arms and hands. Arms and hands can also be used to convey intentions and to fight. Some people hence use them to coerce or resist each other, wrestle with each other, prop against each other to avoid intimate bodily contact, or grab each other to help the bodies and legs to do the movements. These are the misuses of the arms and hands. Beginners need to overcome the habit of using arms and hands. Tango is led and followed by the torso. Arms and hands should be used only to form a comfortable embrace, not as tools to lead and follow, or to assist the movements of the body, let alone to kill each other as weapons. The touch of the arms and hands should be gentle and weightless. Dancers need to dissociate the arms and hands from the body and not use them to lead, follow, maintain stability or do steps.
The torso is the communication and command center in tango. The dancer uses the torsos to lead, follow, communicate the feelings and bring on the movements of the lower bodies. The featured intimacy, comfort and oneness of tango is directly associated with the torso, which, unfortunately, is ignored by action-oriented dancers who use an open hold to replace the embrace, putting the torso to petty use under the command of the arms and hands. As a result, the exhibitionist tango that they created becomes a totally different dance from the social tango that emphasizes the embrace and feelings. (See Social Tango and Performance Tango.)
In my previous post I quoted a tanguera's insightful observation on tango. What she called the first layer technique, namely, to maintain a comfortable embrace, and the second layer technique, namely, to pursue the visual beauty, in essence refer to the function of the torso and the function of the legs respectively. In tango, the torso is in relative rest in the embrace, but the movements of the legs are brisk and colorful. If the torso is associated with the feelings, then the legs are the representatives of the beauty. A good tango is a perfect combination of the two. Formalist dancers concern only about the look and ignore the feelings, and they use the torso as but another limb to create movements under the command of the arms and hands. However, pursuing the visual impression at the expense of the intimacy and comfort of the embrace is not worth the candle. Throughout its history, from tango milonguero, to tango Villa Urquiza, to tango fantasia, to tango Nuevo, the alienation of tango clearly follows an aesthetic path farther and farther away from the embrace and feelings. (See The Styles of Tango.) I do not think that direction is worth advocating. I believe the juxtaposition of the comfort of the embrace and the beauty of the footwork is totally possible. It does not have to sacrifice the embrace in order to pursue beauty. Many beautiful tangos danced by outstanding tango dancers, such as the Poema danced by Geraldine Rojas and Javier Rodrigues, and many tangos danced by Noelia Hurtado and Carlotos Espinoza, are classic examples.
These dancers can achieve such degree of excellence because they are adept in using the hips, which are like the swivel that joins the upper body and the lower body. Because the torsos of the dancers are connected in the embrace, they need to swivel their hips in order to move their legs around each other. In tango terms this is called dissociation. (See Dissociation and Gear Effect.) Educated tango dancers can dissociate their upper body and lower body to a greater degree, so they can step freely around each other without breaking the embrace. Dissociation is not only a physical separation, but also an artistic division of labor, enabling the upper body to remain in the comfort of the embrace, while allowing the lower body to maximize its creativity. In comparison, the bodies of the novices are not flexible enough to be dissociated freely, so, instead of using the torso to lead and follow, inexperienced guys often lead with the hands, and gals tend to turn the whole body instead of swiveling the hips, and they grip each other with the hands to support the movement of the body, causing the rupture of the embrace and awkwardness of the movement. You may call it by the fine-sounding name of "open embrace", but its real reason is the lack of the ability to maintain the embrace when dancing, thus resorting to a relatively easy substitute, which in fact is cheating. But cheating has a price to pay, as it can only fool others, not yourself and your partner. The professionals use open embrace on stage to perform for an audience, not for their own comfort and pleasure. They pay this price for their job. As soon as they go to a milonga, they switch to dancing in close embrace. (See Social Tango and Performance Tango.) Novices who envy their glamour on stage, blindly imitate it in the milonga without even can embrace well. Such crude imitation only makes them look foolish.
To sum up: When dancing tango, the head and the arms and hands should be completely relaxed and not interfere with the movements of the body. The function of the torso is to communicate the intentions and feelings and bring on the actions of the lower body via an intimate and comfortable embrace. Tango's beautiful steps are the function of the legs. The key to maintain a comfortable embrace and simultaneously maximize the beauty of the footwork lies in the swivel of the hips. Learning tango is not primarily learning the steps, but learning to control, coordinate and properly use the functions of various parts of the body. Focusing on the steps and ignoring the embrace and feelings is the primary course of the misuse of the body parts in tango. (See The Thirteenth Pitfall of a Tanguera.)