After recovering from the intense experience Jake decided to stay in Caleb for a while. He loved being so young again. And Caleb has an amazing body.
Jake decided to get dressed in Caleb's pajamas. "Wow, these are comfortable. Probably because I'm not wearing any underwear" he said. When he got fully dressed Jake decided to do some research to what being a 12 year old is like. He accessed Caleb's memories and thoughts.
"Wow, Caleb has such an amazing life" Jake said. "It's way better than my own". Jake thought about it for a moment and the made a decision. He walked to the bathroom and looked Caleb into his eyes in the mirror. "Well Caleb, since you have such a great life, I have decided that I simply want to BE you." Jake said to the reflection.
Jake then focussed so hard on being Caleb he passed out. A little later he woke up and looked in the mirror. He was still in Caleb. "Did it work?" he said in Caleb's voice.
He then focussed on becoming a ghost and saw his new body (Caleb's body) become transparent. "Wow, I can't believe it actually worked." he said. He had successfully merged with Caleb having all Caleb's memories and thoughts as well.
Jake (now Caleb) rematerialized himself and thought about how to go on from here.