Their bull's words proved prophetic.
For the next year and half their new bull took the husband and wife under his wing as his exclusive cuckold couple.
Before the man agreed to be their full-time bull, all three of them sat down to discuss their goals and expectations regarding their potential new dynamic. They met at the couple's home the day after their first encounter. The cuckold knelt naked on the floor as his new bull and his wife sat fully clothed on the couch.
The husband was informed that from now on his wife and her bull would be in charge. The cuckold would submit to them both. The cuckold's sole purpose in the household would be to facilitate the sexual gratification of the couple he now served, without any thought to his own appetites or satisfaction. Furthermore, the husband would be forbidden to masturbate without his wife's or his bull's permission.
The husband was further informed that his wife and her bull would expect absolute and enthusiastic obedience. Any lapses would be met with swift and severe corporal punishment.
"Do you accept these terms, cucky?" their bull had asked formally as the threesome completed their discussion.
The husband shifted nervously on his knees and looked down at the floor. It was not lost on the bull or the wife that the cuckold's diminutive penis was once again rock hard, the modest appendage visibly throbbing as his bull explained his fate.
"Yes, sir," he said softly, continuing to stare down at the floor, his tiny erection never flagging.
The wife beamed down at her husband, then leaned back on the couch. She reached out and took her bull's hand.
"Shall we get started with his training?" she asked coyly.
The bull raised the wife's hand to his mouth and gently kissed the back of her hand.
"You took the words right out of my mouth, darling."
***
And so the husband had been trained.
The fledgling cuckold was trained to suck cock the way his bull liked, spending hours kneeling between the man's thighs as he sat on the couch beside the wife, both of them commenting on his progress as his oral skills steadily improved. In less than a month, the cuckold was able to deepthroat his bull's entire ten inch shaft without gagging.
The cuckold also learned how to please a man in other ways, spending several lazy afternoons worshipping his bull's ass, his tongue becoming ever more limber and lively with each training session.
It was at one of these analingus lessons that the bull had felt some stubble from his cuckold's cheeks on his taint as the husband was eating his ass. The man's first instinct was to bend the hapless husband over his knee and administer a firm spanking for his lack of attention to grooming, but then he reconsidered. After all, his cuckold could not be expected to control the timing of his whiskers.
The bull settled on a simple solution.
He ordered a black spandex hood for his cuckold. The hood had two eye holes and an overly large mouth hole. The thin fabric covered the cuckold's face and would prevent his bull from feeling any stubble as he worshipped his bull's ass or balls.
Thereafter, the husband was kept naked, collared, hooded and plugged in the presence of his bull. When the man and his wife had sex, the husband would kneel at the foot of the bed, his miniature erection throbbing and leaking, until he was called upon to clean up.
The cuckold accepted his new neutered status without question. He did not protest when his bull ordered him feminized and dressed only in women's lingerie and high heels during his visits.
"I'm basically training you as my cock whore. You might as well look the part," his bull had said as handed the husband a pair of his wife's panties to try on.
Thereafter, the wife had taken enthusiastic pleasure in selecting outfits for her husband to wear for their bull and ordering additional accessories online such as stockings and heels.
A few weeks later, when his bull decided to place him in permanent chastity, the cuckold did not resist. The husband's previous manhood was by then just a faint, distant echo as the small steel cage was fitted around his tiny penis.
"I don't want you being distracted by that little nubbin when you're serving us," the man had explained with casual cruelty as he settled the device into place.
The cuckold had nodded in mute acquiescence as the lock was snicked shut.
And with that, his puny erections became a thing of the past.
When his bull ordered all body hair below his neck to be permanently removed, the cuckold accepted his fate with calm equanimity. His wife accompanied her husband to the laser treatments, inspecting each successive denuding with a keen eye. It took five full sessions to complete the task, the husband lying naked on the table, his chastity cage on full display, as the blushing young female technician completed her work.
A month in to his servitude, the cuckold was informed by his bull that it was time for his deflowering.