Other stories based on cube idea this: 
First (start): www.deviantart.com/vfrcbvvfrcb…
John: www.deviantart.com/vfrcbvvfrcb…

If you like my art, sketches, stories, you can find more like this here (thanks to everyone for the support, it's very important for me): www.patreon.com/greentg

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Frank hated being an older brother, especially when his mother forced him to play with his younger sister, he was already 14 years old and had completely different interests, although he was a very modest teenager and did not have success with girls. adults and did not like, like all children of his age, when they talk to him like a little one. That day, Frank was forced to play with his sister in the sandpit because his mother wanted them to be friendly and forced him to be a good older brother. While digging in the sandbox with a shovel, the little sister came across something solid. She began to dig harder and pulled an interesting-looking cube out of the sand with a spatula, which looked very unusual and of course Frank also paid attention to this, he had never seen anything like it.

- Well, let me have a look here. 

He wanted to look at the strange find of his sister and investigate a strange object. When he touched the cube, then some incredible force suddenly began to pull it inside, turning his hand into something stretched. It didn't hurt, but it was strange, and although Frank immediately screamed, no one paid attention to it, because for
everyone else in those few seconds, reality changed so that Frank did not exist, and his sister, like his mother, immediately forgot about that there was a man like Frank. 

Opening his eyes, Frank realized that he was lying on his stomach. There were no sounds of the city, only the singing of birds and the noise of trees. He looked up in horror and made sure that he was not in the sandbox and that his sister and other people were not nearby, there was a forest and trees. He was lying on some kind of cloth that looked like a blanket. Trying to get up, Frank felt something pulling his skin on his chest down and stretching it. He looked down and was shocked by what he saw. Instead of his teenage hands, he saw small hands with makeup and small wrinkles, his skin was covered with age spots. A gold ring was visible on one of the fingers, but that was not important at the time. Long hair touched his face and he had to straighten it with one hand so that it did not block his view.

- What …

Frank began to speak and was surprised at the sound of his voice. It was the voice of an adult woman with a slight hoarseness that she received from a nicotine addiction. He heard some kind of noise and he had to distract himself from his new sensations and look around. A plump adult man in a checkered shirt and jeans walked in his direction from the bushes. He zipped up his fly and was very pleased 

- I'm sorry Jess, it's just my stupid bladder and beer. Oh shit, why am I zipping up my fly.

He was getting closer and closer and Frank did not immediately understand the last phrase and did not immediately understand why this man began to take off his jeans and only after he came closer and tried to kiss with the words "Where did we stop there?" Frank guessed what situation he was in, although he still has a lot to
learn

The Incredible Probabilities Cube is a very complex artifact. It may seem that he accidentally moved people to other bodies in another reality, but in fact it was a very powerful and intelligent thing that picked up a new body and life not only according to genetic parameters, but also according to psychological ones. At the time of the move, Frank was in puberty, he wanted to be an adult, he wanted his mother not to force him to do what he did not want and wanted sex. He received all this, as well as other people who were "lucky" or "victims" of this artifact.