Jeff wanted to make this change big. He thought on what all he could do; Turning the whole world into anthros? Seemed like an interesting thought, but not what he really wanted.
As he thought, his thoughts drifted to normally unaccepted ideas. "Maybe something regarding... incest? Could be fun seeing humanity's views shift so much.."
He thought about what could drastically change the world, and kept the incest thought in mind... and had an idea. Just the thought of it could be really interesting.
He decided on having people live inside eachother... Specifically, though, each person lives in one of their relatives. He wanted to truly see how living inside another human being would work, and started on it.
He knew he should set which body part people live inside, but... He wasn't sure what relative to do yet, so he would need to decide that one first. Or should he even do a relative..?