He thought about different things he could try with the device. As he held that steel circle in his hands he became nervous, what would he actually do with it?
He realized that the idea of being physically changed, possibly permanently, was a bit scary for him. He'd rather just create a change that he wouldn't first be a part of, mabye something that would create a new sex.
Looking at the demographics displayed on the disk, he changed the demographics for women so that instead of 99.9% having vaginas, 99.9% would have penises.
He thought about what he'd just done, if this worked he'd never see another pussy again, he'd be stuck in a world where everyone had a dick. It's this really what he wanted?