When Charlie said I wish I were you to his father while arguing and holding a magic skull his wish was granted, his body instantly grew into his fathers image bursting out of his clothes, leaving him wearing tatters while his father shrank into him. After the initial shock he sends his father to school in his place while he lingers at home in just a towel looking at his new body, at his fathers face, marvels at armpit hair, opens the towel to inspect his new manhood then looks up with a astonished smirk and start dancing in glee for a few moments before finishing it with a flex of his dad’s muscles