Gyrfalcon's Keep That I could be looking for

As she spoke to him, he understood. Maybe not as much as she'd hoped, but some of what she said did resonate within him. The intoxication of her presence aside, Tetsubo was not the type to let his own body have dominion over his desire; he was well trained to ignore his body to a great extent, perhaps too thoroughly, as he had long ago mastered the ability to ignore his pain. So too he could ignore this desire for pleasure - because he didn't know it was pleasure his body sought, despite the fire in his groin. He knew, from her explanation, that what he wanted stemmed from procreation to some degree; but Tetsubo knew that it was taboo. That his kind - the beasts of the nether - were not the same as those bound to this earth. He knew she was different too, in the same regard. Whatever tempted him close to her, pulled him in and tested him in this way, it was not meant for him.

Thus, when she finished speaking, he withdrew from her. It pained him to some degree - in ways that made no sense to him, and he did not grasp for any understanding, but at the same time Tetsubo was curious - yet it was clear to him this was a test. Some kind of learning experience. Maybe something presented to every beast at some point in their life once they had found a master and lord to serve. He pulled back, her scent still flooding his senses, tugging at him to be close, close, close, and yet the boy chose to put distance between them instead, silent and watchful, as if he were a student awaiting the next stage of a lecture.