Know Her Erogenous Zones

Backfield in Motion

Apply a gentle touch—just barely grazing the skin—to the sacrum, the area of her lower back just above the tailbone. As the skin warms, apply increasing pressure to either side of (but not directly on) her spine. If she's comfortable with it, move lower to massage the tops of her buttocks. She's likely to find this maneuver extremely relaxing, not to mention stimulating.