The Wishing Stone was something that Olaf took for granted. After finding it by accident at a storage center auction for delinquent funds, he ended up using the stone to fix all sorts of things in his life. He used the wishing stone to make his construction job much easier as a carpenter - he could finish his work within seconds.
With a simple wish, the job would be done. He had to handle framing, cutting from existing materials, and other carpentry-related tasks. People were amazed at how quickly he could work, and everybody was oblivious to the fact that he was using magic to make his life easier. He didn't realize that the stone wasn't actually doing his job correctly. He would wish for the final product, but the things his wishing stone constructed would collapse after a few days.
The Wishing Stone didn't seem to grant a wish word for word. Olaf had an idea of what he wanted to wish for, but the fullness of the wish would never be granted. Sadly, he realized this too late. He ended up using the Wishing Stone to give him the perfect woman, and instead of creating a submissive slut that would obey his every command, the stone's magic began to transform his body.
Olaf got down on all fours and moaned as a strange rush of energy moved from his head to his toes. Every inch of his body felt like it was on fire as his skin shifted and morphed. His chiseled chest grew large, firm breasts, and he felt his waist shrinking.
Olaf's dick started to shrink, but not completely. He had stripped down in advance since he wanted to have sex with his perfect woman, so when he looked down at his shrinking cock, he noticed that his balls were turning into a set of perfect pussy lips. Olaf could feel his nipples getting hard as a rush of pleasure rippled through him. Soon, he noticed that his hair was growing long and flowing. The sensation of having breasts was incredibly erotic, and his new cunt was dripping with desire. He knew that he would have to make another wish to fix everything, but he didn't know how to word it.
He got up and hesitantly moved through the room where the stone sat beside his mirror. The gorgeous woman staring back at him made him even hornier. Gulping, he realized that he had messed up and that he needed to reverse things. He needed to turn himself back into a man. Frowning, he picked up the stone and whispered, "I wish to be a man again."
The stone glowed red as it always did for one of his wishes, but the glow slowly died down after a hissing sound filled the room. Confused, he wished for his manhood back again. This time, the stone glowed even brighter. Finally, he made a wish for the third time, only to realize in horror that a crack was forming.
Before he could put the stone down to prevent it from breaking further, the Wishing Stone ended up crumbling in his slender fingertips. He was trapped in a female body now that the Wishing Stone was no more. He no longer had a body that could handle the physical stressors of construction, so he would inevitably have to find other ways to make money. But as he looked into the mirror and admired his perfect inner folds and breasts, he figured that he could sell his body pretty well.