A short moan escaped from his lips and Johnny was surprised at how deep it was. His hand drifted down to his crotch and began rubbing it as his body grew. The heat quickly dissipated and the growth stopped as well. His body had grown a meager amount, just barely noticeable. His teenage body was quite fit, and the short growth he had experienced seemed to accentuate his build. He really liked how it looked and looked around for the muscle shirt. The shirt lay innocently on the floor as Johnny went to pick it up. He hesitated a moment as he looked at it. In a firm voice he said, “I want this,” and tugged it over his head and put it on.
The heat came quicker this time, welcomed by Johnny’s hunger for growth. As his body grew hotter and hotter, he felt the pressure come again, this time keeping the muscle shirt on. He began gasping in short hot gasps as the pressure continued to build to extreme limits. He could feel the pressure pushing into each muscle, attempting to strain the muscles bigger. Even as his entire body was growing, Johnny looked down to marvel at his growth. His legs pulsed, growing and pumping. His thighs grew thick and hard; his calves bulged aggressively. He felt the muscle tee stretch more across his chest as his pecs pumped full of strength. His shoulders expanded out as his body quickly went from swimmer’s build to wrestler build. Everything was thicker and broader on Johnny’s body. The growth continued to accelerate as the muscle shirt forced more heat into his body. His neck felt swollen and thick as his body was pushing the limits of what would be considered wrestler’s body. Grabbing his crotch with both hands, he began rubbing his underwear in earnest, completely turned on as his body expanded more and more. His torso completely filled the shirt, and even if he had wanted to, there wasn’t much chance of removing the shirt without damaging it.
His crotch, suddenly stimulated by his hot palms, was filled with the growing pressure of the shirt. His average package seemed to grow at a rate disproportionate to the rest of his body, fed by his lustful needs as a man.