You start to alter the drawing, not sure where your new artist abilities are coming from, and draw Sean as if he were seven or eight years old. Then, for some reason, you draw him in over-sized clothing, the clothing he's currently wearing of course.
"There I finished now you-"
You stop, for before your eyes, Sean is getting smaller, no younger!
Before your eyes, Sean's clothing becomes to large, as he reverses through puberty, twelve years of age, ten, eight, then finally resting when he looked to be no more than seven.
Sean is now a seven year old child, dressed comically in over-sized clothing. His shoes and socks are lost on the floor, and his pants are at his ankles, numerous sizes to big. His t-shirt, once somewhat small, now went down to his knees saving his modesty.
"What happened?" Sean calls in a frightened voice, a whole octave to high.
"The drawing changed you!"
"... You made me younger!"
"Yes..... And then it really happened."
Sean suddenly grins mischievously. "Well since I guessed correctly, I guess it's my turn to draw you."
He starts to doodle and.....