Wear it for a bit

Pulling his shirt on over the bra, Bill left the changing room and took a little more time searching for bras than he put into the first go. He picked a few out, still plain but standard. After a little bit, he returned to the changing room and removed his shirt.

Looking into the mirror, he was still surprised at how large this push up bra made his boobs look. He pulled it off and... He narrowed his eyes. They still looked big. He hurried to try on one of the bras he had grabbed and found that it didn't fit, despite being the same size as the push up bra. "What the hell?" he asked.

Looking at the push up bra, his eyes widened as he read the size. "34 C? How did it get bigger? How did my boobs get bigger?" Was the damn thing magic? Clearly magic existed. Could it have made his chest grow? It sounded insane...

He glanced at the pile of now useless bras and did a few experimental steps. His boobs bounced significantly more than before. They'd definitely be noticed. Did he risk putting the bra back on to help with that, or go without and potentially draw the eyes of other customers?