Applying the changes

Turning his phone back on, Jack reopened the app and began to pull his pants back up. The phone waved around as he did so and Jack felt the weight of his crotch disappear.

"What? No!" he whispered in a panic. His cock had returned to its original size.

Jack frantically whipped his pants off again and looked at the phone to check what was wrong. The screen looked exactly how it did before, "huge cock and balls" entered into the text field, but the camera view was aimed at the bathroom wall. Realization dawned on Jack and he pointed the camera towards his crotch. The instant his cock came into view, the familiar weight returned and his member was gigantic again. Amused, Jack pointed the phone left and right, instantly shrinking/enlarging his junk repeatedly. Deciding to test a theory, he kept the phone pointed at his crotch and turned the screen off again. This time when he turned the phone away from his dick, it maintained its massive size.

"Weird," he muttered.

It seemed like the filter preview stayed attached even when the app was closed, as long as he had it pointed at himself beforehand. Jack wanted to try more filters but also wanted to keep his gigadick, so he opened the app and snapped a picture of his new cock. A flash of dazzling light blasted out of Jack's phone and illuminated his junk. Unexpectedly, it had returned to it's original size once again.

"What is going on with this thing?" Jack growled in annoyance.
In the app, a spinning Snapster logo popped up with "LOADING" written above it.

Suddenly, Jack felt something. A warm energy coursed throughout his groin, concentrating on his cock and nuts. An almost comical noise of skin stretching emanated from Jack's crotch. He doubled over as he was overwhelmed by the feeling of his cells dividing and multiplying. It wasn't painful, but definitely intense and physically demanding. Jack watched in awe as his average dick swelled and grew downwards into the monster he possessed only moments ago. Beads of sweat formed on his forhead and he bit his lip to compose himself. A deep guttural moan escaped his lips as his enlarging member surpassed his knees, and his balls pressed into his inner thighs.

Finally the growth halted. Jack let out a sharp exhale, and gasped in a lungful of air. He hadn't realized that he'd been holding his breath.

"Honey? Are you alright in there?" Jack's mom called out through the bathroom door.