Once he sat down at the computer, Jeff's dad had a different idea.. He decided to turn his son into a pair of white briefs that would fit him!
Jeff was curious and starred to look at the options his dad was inputting, but it was too late, the change was set to immediate and Jeff instantly became a pair of medium white briefs.
His father had made him so that he would see and hear things from the perspective of the person who was wearing him, but that he would feel things from first person, as the pair of briefs. He also made a mental connection between the wearer and Jeff, so that they could communicate through thought. His dad couldn't wait to hear what Jeff would think about the sensation of being wrapped around his junk and butt, so he stripped immediately.
Putting both his legs into jeff allowed Jeff to see for the first time since he was transformed, and to Jeff's dismay, he was about to cupping his dad's junk! His dad knew that Jeff was getting a full view of this from the same perspective he was so he made sure to get a good look at his own dick so that Jeff would too. As soon as he was all the way on his father, they gained psychic communication.
"What the hell did you do to me?!?" roared Jeff. "Well if you hadn't figured it out by now, you've just become my new favorite pair of underwear, my boy," replied his father.