In a dark, secluded alleyway, just off the bustling city street, a man named Alex was standing with his zipper open, pants down around his ankles, and his throbbing erect penis exposed to the cool night air. He couldn't believe what he was about to do, but the temptation was too strong to resist. The sound of a low moan echoed in the distance, and it wasn't coming from a human.
As Alex watched in amazement, a fierce, feral-looking dog appeared at the end of the alleyway, its eyes gleaming with lust and hunger. Its muzzle was covered in slobber as it licked its lips, exposing large sharp canine teeth that seemed to glow in the moonlight. The dog's fur was coarse and stood up on end, bristling with excitement.
Alex could feel his own heartbeat racing, and his cock twitched spasmodically in response to the dog's presence. Without hesitation, he stepped forward and positioned himself behind the animal. He could feel its warm, damp breath against the back of his neck as it leaned into him, eager for what was to come.
Slowly, Alex reached down and began to stroke the dog's swollen, erect penis - a long, thick appendage that pulsed with each touch. The sensation sent shivers up and down his own spine, and he couldn't help but moan softly in response. His hands trembled as they explored the contours of the beast's genitals, feeling their rough texture and firmness.
As Alex continued to stroke the dog, it began to growl softly, a deep, guttural sound that seemed to resonate within his very soul. The sound intensified with each passing moment, until finally, Alex could no longer resist the urge to sink his teeth into the dog's neck and mark it as his own.
The dog let out an agonized howl of pleasure as he bit down, tasting the salty, metallic blood that flowed from the wound. It was a potent aphrodisiac for both participants, causing them to moan even louder. Alex could feel his own erection throbbing against the dog's body, and he knew it was time to take things further.
With one hand still stroking the dog's penis, Alex reached down with the other and pulled his own member free from its sheath. It stood proudly at attention, a shining beacon of desire that seemed to call out to the dog in turn. The beast let out a low whine as it sniffed the air, seemingly drawn to the scent of another animal's arousal.
Alex guided the tip of his penis against the dog's own erect member, and he felt the familiar friction that accompanied each stroke. As they continued to thrust in unison, Alex could feel the dog's cock swelling even larger within him - an overwhelming sensation that threatened to consume him entirely.
The dog's hips began to move back and forth in response, its cock sliding up and down against his own with increasing speed. The sounds of their passionate coupling filled the alleyway, mingling with the scent of sex and fear that seemed to hang heavy in the air. Alex could feel beads of sweat forming on his forehead as he continued to pound into the dog, each thrust driving him deeper into this wild, primal fantasy.
The beast's growls had grown louder and more intense, its body tensing with anticipation. As it reached its peak, the dog let out a gut-wrenching howl that echoed throughout the alleyway before releasing a torrent of hot, sticky cum into Alex's waiting mouth. He eagerly swallowed each spurt, savoring the taste of this animalistic union.
With one final thrust, Alex felt the dog's penis twitch and spasm within him as it climaxed, shooting one last stream of cum onto the ground below them. Exhausted but content, both participants collapsed to the floor, panting heavily as they reveled in the afterglow of their illicit encounter.
As Alex stood up to leave, he couldn't help but smile at the memory of this incredible experience - a wild, untamed adventure that had pushed him to the very edge of his desires. He knew that he would never forget this night and the fierce, primal animal that had been waiting for him in the darkness.