Trying some ass on for size

Josh began to look around the gym. He inconspicuously got on one of the ellipticals and scanned until he saw something he liked. On one of the squat racks - a girl and a guy spotting each other.

The girl’s tanned midriff peaked between green cycling shorts and a matching sports bra. She had dirty blonde hair in a tight braid, and her face… well, Josh had no idea what her face looked like. His focus was on one thing and one thing only: her amazing, round ass. He tried to avert his eyes as she went in and out of a squat, but he seemed drawn to it. He needed to have it.

Josh thought about it for a second and then it became true. He felt his ass begin to expand immediately. It grew and grew… it stretched out his shorts until they couldn’t take it anymore and it swallowed the seam. He had a big, beautiful ass. One that was stolen from someone who apparently cared about it a lot considering how much work she was putting in on the squat rack.

Speaking of which - Josh looked over and found that her ass was not nearly as appealing as it once was. The bicycle shorts tried their best but it was to no avail. Josh didn’t know the limits of his powers, but he figured at this point he was the one more deserving of wearing those shorts.

All of a sudden, Josh felt another shift. His basketball shorts became tighter and tighter, and they began to inch slightly up his legs. He saw them become a stretchy green fabric and they became taught across the front of his junk. He also felt something else… his underwear had most definitely changed too. He was no longer wearing boxer briefs. He took a stride on the elliptical as he assessed…

Yep. As he thought. He was wearing her thong.

Meanwhile back at the squat rack, the once gifted babe was now not only missing her ass, but also the shorts (and underwear) that had done such a good job defining it.

Josh reached back and grabbed a handful. It was a little weird, but he noted less friction when he strode as he was now absent of any hair in that area.

With this successful test Josh was more excited than ever.