Frontal position - Offset: The partners are about 30 CM (1 foot) apart, and very slightly offset. That is, the Man's Right Foot is pointing between the lady's feet. His left foot is pointing outside of her Right Foot. (This greatly reduces toe to toe contact!)    ;-)    In this fashion, a slight 'lean' will be produced when the couple embrace. This is the typical "Tango Lean!"

Lady's Right upper arm resting on the man's upper Left arm, her hand on his shoulder. In this way, she can feel the mark produced by amy moving action of his right arm and shoulder. Her left hand rests softly on the man's shoulder without exert any pressure.

Man's Right arm around the lady - his hand (closed fingers) on or close to her shoulder blade. Man's left arm outstretched somewhat at near shoulder height (or comfortable position). Hands are palm to palm.

The traditional form of contact in tango involves something called "The Tango Lean". In this way, when they embrace, the partners will touch the sides of their foreheads (more or less depending on their respective heights). This brings the top portions of their bodies somewhat closer, while the lower body is somewhat farther back, producing a slight lean, - the "Tango Lean".