The chamber soon started to move most of Daniel's intelligence from his brain to its storage backup, meaning Daniel's human understanding of human concepts was being systematically erased from his consciousness. Within a few minutes, his brain was only thinking of the world in terms of primal animal concepts, unable to read, write, speak, dress or do anything else like that. Functionally, Daniel's mind was that of an animal.
The chamber then moved upwards, taking him to the breeder enclosure, and he walked out into a tranquil field filled with other humans. In front of him he saw a female, lying on her back in the grass with her legs spread. He came up to her, getting hard almost instantly, and started licking her pussy. She thrusted against his face, moaning and yowling eagerly, and once he couldn't hold himself back, he moved himself up to her face and pushed his cock inside her.
She clung to his shoulders eagerly, and he pounded her rhythmically, instinctively, neither of them able to stop. As a virgin, this was the best sensation Daniel had ever felt, and he admired the girl's big, soft boobs as he fucked her faster and faster, eager to fill her with his seed and breed her.
Before long, her pussy clenched around him so tightly he couldn't hold back, and he grunted as he came hard, not a single drop of his cum leaking from her. They kissed messily, and once both were ready, the female separated from him, going off to find somewhere to rear her brood.
Daniel lay on the grass contentedly as the further change he had put down on his form (not that he remembered that was why this was happening, of course) started to take effect. He felt like his penis had served its purpose, and yearned to have his own brood.
And his body started producing feminine hormones in response to this feeling, strong enough to reconfigure his body. His chest rapidly developed, forming soft breasts for his young to suckle from and from which he could receive feminine pleasure. His hips widened to accommodate the capacity for childbirth. His skin softened and his muscles slimmed, making his figure more arousing to males than to females. And his balls moved up inside him, reshaping into her ovaries, and his penis rapidly shrank back inside her until it was a small, sensitive clit.
Danielle looked at her new form and grinned, lying back and spreading her legs so someone could come fuck her and give her a brood.