A day passes and the effects of both Andy's and Jesse's swapped cocks has affected both of them significantly. Andy has grown more muscular, sporting a defined 6 pack with visible muscles; Andy now looks more like a 16 year old bodybuilder than a 13 year old kid - standing at an impressive 6 feet for his age due to the obscene amounts of testosterone from his new 9 inch manhood. Jesse can't help but feel jealous that his younger brother is almost as buff and tall as he used to be. Jesse is now barely 5'10'' and has lost most of his muscles as a result of his prepubescent levels of testosterone coming from his 3 inch cock.
As Jesse is walking down the hall to get some food to eat, his brother steps in his way, blocking Jesse's path. "Hey little bro" Andy says, taunting his brother. Andy is shirtless and wearing tight boxers to show off his bulge. "From now on, I'm the big brother. Got it?" Andy says.
"No you're not Andy, just because you have my cock doesn't make you the big brother." Jesse scoffs, as he looks up at his younger brother, noticing how much shorter he now is."
"Doesn't seem like you are the bigger brother." Andy says, pushing up against Jesse's smaller frame. "I've got the bigger bod, and the bigger cock." Andy says as he pushes his crotch up to Jesse. Right as he bumps Jesse with his crotch, both boys feel a shock travel through their bodies combined with a wave of dizziness. Jesse shakes off the feeling and looks back at his brother to a horrific sight - he is now standing even shorter compared to his brother. Jesse guesses he is now 5'8'' while his brother stands at an impressive 6'2'' - Jesse's old height before his brother stole his dick.
"Whatever you say little bro" Andy says, mocking his brother before pushing him and heading off in the other direction. Jesse notices Andy is starting to grow facial hair and a faint treasure trail. Jesse also feels his own face and body and notices he is now as hairless as a young teen, having only peach fuzz now.
"I gotta do something about this! Andy is stealing more and more of my manliness. I might even be the older brother anymore!" Jesse thinks to himself, realizing the longer he has his brother's dick, the more he turns into a little kid while his brother grows into a stud.