Ty thought of a unique way on how to change Tico. Since most people use the treadmill to sweat off pounds, why not reverse the effect so the more Tico sweats the bigger he gets. Each time Tico gets on the treadmill the bigger he will get. To make sure that Tico doesn’t tire out too soon Ty increases Tico’s stamina. A forty five minute run on the treadmill should produce interesting results.
The Bike shorts that Ty had on were being stretched to their limit by his growing bulge. His cock was extending down one pant leg creating a long obvious bulge. The more he thought about how big Tico was going to get the harder he got
Up and down Ty’s legs went as he peddled the bike. Like an old fashion pump handle his cock went along for the ride getting harder with each rotation of the bikes peddles. Ty fought back the urge to shoot his load right then and there by shifting his concentration back to skinny boy on the treadmill.