A slide rule is important to my bag of tricks, she thought, feeling the cold steel against her groin and pressing it between the flesh of her soft thighs.

She drew it up then and pressed it perpendicular to her body, across her breasts. She measured the span between her nipples, although she couldn't really see in the dark. She guessed the span to be about seven inches.

She measured the circumference of her tits, and also the diameter. She decided the left one was bigger than the right one. She tried hard to remember the formula for finding the perimeter of her breast, when she knew the diameter. She gave up trying.

The demands of her body were too great. "Ahhhhh," she moaned, feeling the juices of her cunt squeeze out of their walls.

She gave up the ruler just then and used her hand. Her old familiar hand that knew the ins and outs and secrets of her private places better than her ruler did.

She remembered a movie she and Susie had snuck in to see recently. They had seen a woman masturbate. In fact, they had seen two women masturbate. She remembered how they'd done it, and emulated them, emulated the gestures of these two, experienced blond actresses.

She recalled the one lying in bed. The camera was at her back. She could see the hand of the woman jut into her groin, and the other hand wrapped around one tit. The other woman, her companion, had stood in the other room and watched her through the doorway.

The camera had showed her silhouetted against the doorway. The woman in bed jabbed at herself and groaned and spasmed.

Jody had had the funny feeling, then, of creaming and coming herself, right in the seat of the theater.

She remembered that scene now, and felt all horny again. Her hands jabbed away at herself and she felt deliriously happy. Her hands and fingers rode all over her body.

She imagined herself on the movie screen of a theater. She imagined auditioning for the art of the masturbator.