He didn't know what had happened. He was a scrawny mail clerk just a few minutes ago. But he had pulled the bright blue briefs from their package & now he found himself wearing them & swelling with muscle. Suddenly he felt a need welling up in his newly muscled pussy, an itch that needed filled. He knew that that big package in the front was just for show, to entice real men to follow him into bathrooms, & alleyways. He was a muscled up bottom slut built to take a pounding.










