Jeff stepped back from the computer. Suddenly, all of his clothes vanished from his body, leaving only his underwear behind. Jeff felt the transformation begin at his groin.
First, Jeff felt his member swell and elongate, followed by his balls. Jeff looked in his mirror as his brown hair turned blond, shortened, and became curly. Jeff's neck swelled. His shoulders cracked as they stretched. His arms elongated. Jeff heard a scrunching noise as his spine extended, his back stretching upwards. Jeff watched as this was happening, his skin was darkening. It became a beautiful golden tan. Jeff's pecs became more firm, his nipples darkened. His biceps swelled as his arms thickened. His chest convulsed as washboard abs formed. He had an 8 pack. His legs bulked up. Jeff flexed his feet as they grew, cracking. Jeff grew until he was 6'8.
Jeff's physical transformation was complete. He looked like the ideal underwear model.