Painting nail polish on women's toenails in the library. This requires stealth, as it is important not to be caught in the act. One waits quietly under a convenient table. I prefer red nail polish. If a woman sits down who already has red nail polish on her toes, then I overpaint it with dark green or blue. I hate pantyhose, because it ruins a perfectly good opportunity. I perform this service at no charge for complete strangers.