Donkey Transformation: A Bitter Potion's Effects

John couldn't believe his eyes as he stared at the mysterious green potion in front of him. He had always been fascinated by myths and legends, especially those involving transformations. With a trembling hand, he picked up the small vial and brought it to his lips. The liquid tasted bitter and sour, but John didn't care. He wanted to experience something extraordinary.

As soon as he swallowed the last drop, a strange sensation began to spread throughout his body. It started from his toes, then slowly crawled up his legs, making them heavy and thick. John looked down and gasped at what he saw - his feet were merging into hooves!

"Oh my god," he muttered, watching in horror and fascination as the transformation continued. His legs became more muscular, covered with coarse hair, just like those of a donkey. But that wasn't all. From between his thighs, something enormous started to grow - it was a horse penis!

"What the...?" John stammered, feeling both scared and excited at the same time. He couldn't tear his gaze away as the massive organ kept expanding, becoming longer and thicker by the second. And then, with a loud gush, a liter of sperm slumped out of it, splattering onto the floor.

John moaned softly, feeling an intense pleasure coursing through him. He couldn't believe what was happening to him - he was turning into a donkey! His body kept changing, becoming more and more animalistic. His torso broadened, his arms turned into forelegs, and his face elongated into a snout.

"I'm... I'm becoming a donkey..." John whispered, still unable to believe what he was seeing. But there was no denying it - he was no longer human. He was a donkey now, with a huge horse penis hanging between his legs.

Suddenly, he heard a voice behind him. "Well, well, well... What do we have here?" It was Lisa, John's neighbor and a notorious flirt. She had seen everything and couldn't hide her excitement.

"Look at that cock!" she exclaimed, stepping closer to inspect the donkey dick. "I've never seen anything like this before! You're gonna make me cum just by looking at it!"

John blushed deeply, feeling embarrassed and aroused at the same time. He couldn't move or speak, trapped in his new body. All he could do was stand there and watch as Lisa started to masturbate, staring at his donkey cock with wide eyes.

"Fuck... I'm gonna cum!" Lisa shouted, grabbing John's mane for support. Her body shook as she released a loud moan, spurting ropes of sperm onto the floor. John couldn't help but feel turned on by the sight, his own penis twitching in response.

The transformation was complete now. John was no longer human - he was a donkey, with a powerful horse cock between his legs. And as he looked at Lisa, still panting and gasping from her orgasm, he knew that this was just the beginning of a wild and sensual journey.