Keep the upright rear hand completely stationary. Animate only the diagonal foreground hand as a rigid object with unchanged size, angle, and opacity, keeping it visually in front so it occludes the rear hand wherever they overlap. From the starting pose, the foreground hand first slides left and slightly downward across the rear palm, then curves into a lower-left position, sweeps rightward and farther downward, rises slightly at the right side, and finally glides back up-left to where it sits in the provided SVG. Make this a smooth, evenly paced looping oval rubbing path, repeating it three times in total.