The Magic Fart by Piers Anthony

satisfied with that. He didn’t wish the woman any ill. Let her have all the orgasmic shitting she wanted. But it was time to put his foot down, as it were. “You’ve had your fun with four women and gouted a lot of gout. Tomorrow we go to Fartingale.” AGREED. WE’LL FORNICATE THERE TOO. Prior was sure they would.

Chapter 6—Plea
    Veil struggled with herself. Now she knew she was on display all the time, day and night, her every action open to public view, even her natural functions. It was horrible, but she was stuck with it. She was the Maiden in the Tower, the prize for one of the men who won the privilege of taking her in sexual slavery for a year. What was she to do?
    First she would stop putting on a show for the monsters. She had to eat, so as to be healthy enough to nurse Chance; she was not going to let him suffer. That meant she would continue to expel clouds of intestinal gas. But she could do that silently, and when she had something of greater substance to do on the toilet, she could make it quick and without any flourish. The rest of the time she would simply sit still.
    Except that she had to exercise to keep her body fit. She had put on flesh during her pregnancy, and was carefully working it off. She had been blessed with a natural hourglass figure, and intended to keep it that way, even if it did make her more of a sexual object. She couldn’t stand to become pudgy or even fat, whatever the cost. Like cleanliness, health was essential.
    So she did her calisthenic routine, stretching and flexing. If this made her more appealing to sundry voyeurs, so be it; it was a necessary sacrifice. Because it was warm, and the clumsy clothing got in her way, she did it in the nude. That meant that the peeping Toms, Dicks, and Harrys would get some pretty special sneak peeks as she lifted her legs or bent over. Surely they already knew the nature of female anatomy. But this was the extent of the illicit treat she would provide them. With luck they would soon be bored by the repetitious nature of the routine.
    Then she covered herself and sat with Chance in the easy chair. She turned on the TV. The announcer had been relegated to a separate channel; now she could watch what she wanted. So instead of a titillating Nude on Toilet, they would see a dull Woman Watching TV. It served them right. But if she had been inclined to any smugness about her policy, it was soon vanquished. All of the channels featured programs she hardly cared to watch. One was herself, watching herself watching herself, her full breasts heaving gently beneath the black blob that masked her head. Another was news about the rivalry of men interested in the Maiden in the Tower. Another was pornography, with men endlessly plumbing women, women endlessly eager for the plumbing; the main variety was in the hairdos of the women and the positions of the sex. Another was children’s stories, but not of the kind she cared to expose Chance to; they were filthy if not downright obscene.
    Yet those were her choices. She turned it off. But then Chance starting fussing; the pictures, of whatever nature, were a distraction for him. So she turned it on to the children’s channel, with bad grace. Her captors had her pretty well boxed in, leaving her choices between bad and worse. With luck, Chance would soon fall asleep, and she could ignore the screen.
    “This is the story of the Littlest Turd,” a dulcet female voice said. “He was unhappy, because every time the toilet flushed, the big turds jammed in and crowded him out. They made it to the Great Sewer in the Sea, where the stench was truly wonderful. He couldn’t get flushed, and was left alone in the bowl. He hoped that maybe one of the people beyond the bowl would want to play with him, but they never touched him. It was awful, and he was very unhappy. He just cried all day.”
    The picture closed in on the toilet, magnifying the Littlest Turd until it almost filled the screen. There was a crude face