Any massage can increase the immune power of the body. However, when two people are massaging a single body, the effect of that is likely to be more. Not only will there be a higher intensity of relaxation but also more immune enhancement. A sandwich body massage has effects of improving the sleep of the receiver. Due to stress, your body may not sleep; a massage can help you regain that.
There is nothing better than a sandwich massage, as two people are relaxing you physically. You can try it once, and all the worries of your life will be long gone.