Although it is rarely considered or appreciated, the face down position is perhaps best for massaging the female body. This is not to imply that the front should be neglected, only that the back should be paid more attention.
Some would argue that face to face intercourse is more intense and fulfilling. This may be true on a purely emotional level, even without optimizing the physiological connection. It's simply a matter of which is more important, the mind or the body. During love making the mind is often capable of reaching significantly higher levels than the physical being.
Why is the back so important? There are two primary reasons. The first is simply a design of nature. In the natural world males always approach (and join) with the female from the rear. Evolution has designed the female genitalia to be entered from the rear, as opposed to the face to face, western "missionary" position. Nerve endings of the female genitalia are genetically arranged to be most responsive from the rear. The inside of the thighs and labial lips are more sensitive to touch, when stroked from the rear (as opposed to the front).
Another reason that massage from the back may have an advantage, is that a woman often feel more comfortable and relaxed, as her body is less exposed. The feeling of the "face down" position is conducive in fostering a sense of well being, which in turn makes it easier for the woman to "let herself go".
A carefully arranged and nurturing atmosphere is essential to achieving the greatest possible pleasure. Plan on at least one hour (at a very minimum) of completely undisturbed and uninterrupted time. The massage can be conducted on a reasonably firm bed; a platform design is still better. The room should be warm and draft free. A significant amount of oil (1-3 oz.) should be expended during the massage. Always keep in mind that you can never apply too much oil. Do not spare the oil, lavish it! Use only specially formulated massage oils [we use citrus scented water soluble grape-seed oil in our studio]. A wide range of scents are available, of which the most pleasing should be selected. Be sure to arrange a number of bath size towels to protect the bedding from the excess oil. Soothing music and candlelight will greatly enhance the atmosphere. Turning off the telephone is absolutely essential! Prior to the massage, it may be desirable to take a short shower, as opposed to a hot bath. A bath often tends to loosen the outermost layer of skin, which when waterlogged will shed (creating gritty particles) and interfere with the massage.