Nail Polish

Two friends go on vacation. After a long day of sightseeing, her feet hurt. He offers a foot massage. She's not very convinced but gives in and enjoys it. Next day she asks for another one. He recognized her purple toenails. After a while she pulls out a color-matching vibrator. Next day he recognizes her now red toenails through the sandals. At night during the foot massage, she pulls out a butt plug with a red diamond.