He comes to the decision of having the person worn lose consciousness while being controlled, concluding it'd cause the least hassle; He could do anything he wanted while wearing someone else's body, and they would be entirely unaware. Jeff started typing that specification in, before he moved on to the thought of how control would be handled.
The main idea coming to mind regarding how to take control, if it wasn't automatic, was that it'd be tied to the wearer accessing the victim's brain, and somehow taking control through there. He had the mental image of it being through wearing the brain as a hat, and couldn't help but chuckle a bit.
The secondary option that came to mind was Actually being worn like regular clothing, requiring a wearer large enough to wear their victim like a proper skinsuit, instead of a possession-based approach.