"Well, maybe I could have a turn.. with you being the underwear," Jeff said to his father,who seemed intrigued at the idea.
"Alrighty Jeff, I'll be your boner briefs for a week. But I need to warn you, my boner is much bigger," he said grabbing his junk through Jeff.
Jeff's father quickly made the change and their bodies intertwined and changed until Jeff was human wearing his father as a pair of small sized briefs.
Jeff was standing in front of a mirror and his father could see him from Jeffs point of view. His dad stared at his sons petite body and his cute little package. Jeff suddenly felt his dad's boner against his butt, which gave him an idea.. quickly he took off the briefs and put them on backwards. Taking his father's thick 10inch cock against his 6inch one he jerked them off. Both moaned untill they were cumming all over Jeffs little tummy.
"Oh shoot, time to go to school!"" Said jeff, reversing the briefs again.