Mark's eyes, the color of an afternoon sky, had a cloudiness to them, suggesting an internal struggle. He was a man acutely aware of his own emotional currents, and today they seemed like roaring rapids—his hormones coursing through him with an uncivilized, prehistoric force.

When he met her, a young woman with a noticeable air of insecurity, he felt the primal energy within him stir even more. Her scent, an intoxicating blend of earth and unfulfilled yearning, acted like a catalyst.

"Listen," Mark said, looking into her eyes while maintaining an expression that was both intense and compassionate. "It's not about how I feel for you specifically. It's your scent; it triggers something almost uncontrollable within me."

She seemed both wary and intrigued, her pupils dilating ever so slightly—a physiological response to her heightened state of attentiveness.

"If I allow myself to be swept away by this tide," Mark continued, "I might shift forms, take on an animal's guise. If that happens, know that my intention will be to guide you, to focus all of my energies on you."

The woman's breath quickened, her ribcage expanding more noticeably as she took in deeper gulps of air. Subtle shifts in her posture showed a mix of curiosity and caution, as if weighing the import of his words.

"To lead you to realms of sensation you've never visited," Mark concluded, his voice softer now, as if inviting her to make a choice.

It was a delicate balance, this act of straddling human civility and animalistic desire, especially in a world where the line between the two was blurry at best. But Mark felt the responsibility of it keenly, wanting to make sure her journey—should she choose to embark on it—would be mutually respectful and enriching.

The air between them grew thick with tension and possibilities, a testament to the gravity of their encounter. And so they stood, two souls at the crossroads, guided by the most ancient and unfathomable forces within them.