Justin pointed the device at you for a second and pressed a few buttons. After a minute he walked past to join you on the couch. You couldn't help but check him out as he did, especially as his ass had grown into a round, muscular bubble butt to match the rest of his expanded body. It was hard to ignore his thick cheeks stretching his shorts so tight you could see the outlines of his undoubtedly strained underwear.
Justin sat next to you and handed the remote to you, directing you through the device's menus. Even with his prior explanation, you were surprised to see such detailed information about yourself listed. Height, weight, age, body measurements, hairiness, feet size, musculature, body fat, eye color, hair color, the lists went on and on. You really could change just about anything about yourself with this device.
"We each tried out one stat, just as a test run. Chris gave himself an extra foot of height, I pumped up my muscles, obviously," Justin flexed his new, thick arms with a laugh, "Pick whatever you want. Would be good data to try something else, but wouldn't be a bad thing to get some repeat data either. Oh, before I forget, changes aren't instant, it takes a little while for it take effect- it's fueled by your metabolism, so it only goes so fast. We had to wait overnight to see our changes."
You scroll through the endless list, thinking about the endless possibilities. In the end, you decide to change...