"Stop!" Jen told her as the woman stopped. Quickly Ken erased her from the book and she dissapeared. He'd only needed a test dummy for a moment as he looked back at the book. He wondered what it would be like to do that? How did it feel.
Flipping the book to the page containing him he wrote in that he had breasts. Within seconds the book changed to show his picture with breasts, and his lungs in those breasts as two sacs expanded from his chest.
Ken breath in and out, savor in the feeling as his breasts expanded and shrank with each inhale and exhale. But after a while it got a bit annoying. Removing his breasts from the book he changed back to normal before humming. What else could he changed besides breasts.
Firstly he undid the breast lungs thing. Fixing that he started on his next experiment. Flipping through the book he found the page on women again. So now to change them even more