Jeff wondered what it would be like to have the form of a human but the function of a cock. He clicked on the option and a bunch of questions popped up so he answered them.
Do you want to be able to attach or detach at will? Yes.
Do you want to be able to change form at will? Yes.
Do you want to be the only human cock? No but I want human cocks to be a minority.
Do you want to have a cock of your own? Yes
Jeff answered a few more questions such as duration. He decided a day would be a good duration. Then he chose to be his best friend Dean's human cock.
He clicked to activate the transformation but nothing happened. The Chronivac just purred for a while and then said, "Changes complete". Then it shut down. Jeff tried to turn it back on but it wouldn't turn back on.
Jeff's mom called him down for supper so Jeff turned his computer off and went to supper. He almost forgot about the Chronivac. Every once in a while he wondered why the Chronivac hadn't done anything. Everything was still normal.
Later, when he changed into his pajamas, he didn't bother looking at himself. His mind was elsewhere. He just put his pajamas on, crawled into bed and fell asleep.