John agrees on only swapping the lower body. his dad takes the band and concentrates on his sons lowerbody except the ass which he don't want back.
then his dads legs shrinks in size and his pants fall to the ground to reveal the huge growing bulge he also got from the trade. he also becomes much more shorter.
while John is feeling a strange growing feeling. he sees that he's gettin taller and that his legs is getting thicker, but they're getting too thick! John quickly pulls down his pants so the fabric won't rip of the growing. looking down at his new fatter legs and huge feet he thinks that they go good togeher wih his new ass. and then suddenly all the hair on John's legs, which is dad legs now disapear and all of that hair quickly grows out on John's new legs, feet and crotch!
John's dad is directly pulling his underwear which are very loose now open and looks at his new huge manhood and says "this is perfect, let's stay this way."
John then does the same thing, hving a little problem since his boxers is sitting skin tigh on his new hips and ass he realises that he have to pull them down to be able to see his manhood. so he pulls the boxers down and out comes a little 4 inch dick. John becomes very disapointed with the swap and asks his dad to swap back.
John's dad then tells him that he agreed on having those legs and crotch for a day so no changing back.
What does John do now?