Dustin was jerking his thick muscle cock so intensely, it wasn't until he began stroking slower and slower to accommodate the awesome length that he noticed the growth. He looked down at his meaty growing footlong and shouted "Oh yeah!"
He continued stroking the shaft his massive member with one hand and grabbed the head with his other. Already the fat head filled his entire palm.
Suddenly his shirt ripped down his back as his expanding upper body bulged with muscle and size. Dustin flexed his bodybuilder physique and the shirt tore apart, making him look more like a horse hung hulk.
His head hit the ceiling as the muscle giant's beastly cock erupted all over the room. He unleashed gallons of cum without stopping, and while he was shooting his load he grew even more. He burst through the roof and shot skyward. As his meaty pecs and cobblestone abs passed through the hole and his gigantic cock emerged, he began flooding the yard with cum. Dustin roared as he squeezed his steel hard rod.
Dustin grew large enough that he could step out of the roof onto the ground, his erect dick still spewing juice. Finally at 60 feet tall, bursting with titanic muscles, his olympian cock slowed and grew soft, though still dripping gobs that drenched cars beneath him.