After thinking for a while, you'd come up with a change. You decided that you wanted to switch Paul and Lyle's testosterone levels. Then realising that might not have had immediate results, you decide to make the change even broader: their LIFETIME testosterone levels. Their whole puberties could end up swapped. You had kissed the ring with this in mind and waited, and now you were hearing a yelping noise from the other room.
Assuming your plan had succeeded, you get up and head to the living room. You're shocked with how well it worked, and pleasantly surprised by the random change the ring had chosen as well. This couldn't have gone better. The two of them look completely different. You only recognize who's who by their hair color. Paul has gotten even shorter, now Lyle's old height of 5'4"... or maybe even an inch shorter. His face, which was previously fairly handsome (if slightly round), looks more androgynized. His features are less promiment, more delicate and faint. His face (and the rest of him) have also fattened considerably. Where before, your friend was just chubby, he was now fat. With a capital F-A-T. His stomach was beyond huge. His legs and arms were much wider, the extra pudginess giving your friend a thoroughly soft appearance. You also notice that there is no longer any stubble on his face, and you assume that's ditto for his body.
You can see where it went, though. Lyle is now sporting a full beard (which doesn't particularly suit him). The facial hair travels down his neck and dissapears under the collar of his shirt, hinting at a very swarthy midsection. His facial structure is much more angular and masculine now; although your friend's roommate is quite skinny, his broadened chin and neck give him the illusion of some added mass. Perhaps it's not all illusion -- upon closer inspection, you seem to notice that Lyle looks a little more toned. Just a tiny bit though, after all, it's not like the ring gave the nerdy young man a history of weightlifting. He is tall now, much taller than you would have guessed. He looks like he might have a couple inches on you, putting him at 5'10"! There is an unintended downside to these changes for Lyle, however. He had struggled with acne before, but it seems the added testosterone only made things worse. He was a complete pizza-face now, probably needing the strongest prescription a dermatologist could give him. His skin was no longer pale; everywhere it was exposed, it was a hot, bright, red. You feel bad for this change; you didn't mean to make things any harder for Lyle.
Paul had had some issues with clothes before, usually wearing t-shirts and sweatpants, with the occasional hoodie thrown into the mix. It was always a chore for him to go out and buy clothes, but at least he was presentable enough to avoid any comments or looks from strangers. Or at least that was the case before. The ring had switched their clothes, and resized them to fit their new bodies. Now, like Lyle had been a few moments ago, Paul was a complete fashion disaster. He was dressed in Lyle's outfit from earlier: a wrinkled dress shirt a couple sizes too big (for Paul this probably meant it had to be 4 or 5XXL), a neon orange shirt brandishing several anime characters, and black cotton pants covered in chains and cargo pockets. Even other geeks would probably think twice before wearing something like that.
Lyle, on the other hand, was now dressed very casually. Paul had been wearing a black baseball shirt and gray sweatpants; nothing fancy, but to Lyle, this must seem very dressed-up indeed.
Paul breaks the silence. "Dude, LOOK AT US. Something crazy is going on here... we look like different people!!!" Lyle is breathing heavily, in large gasps. "This is very strange. It's just not possible. Quantum physicists say that anything can happen, but that chance is infinitely low. You have a better chance to win the lottery 100 times in a row!!!" It's easy to see both of them are in a high panic. You don't want to blow your cover, so you join in. "I don't know what's happening, but I should get out of here before something happens to me. Maybe it's in the air!" You cover your mouth and nose for dramatic effect and turn to the door. Your friend reaches out his thick arm, grabbing your shoulder with his sausage-like fingers. "No, no dude, please... I'm freaking out right now. Please." You pretend to think this over, but you're already resolved to stay. You want to see how both of these men deal with their changes. Besides, it's only a couple minutes until midnight if you're keeping track correctly. If the ring resets then, you'll be able to cause another change very soon.
You break the silence, deciding to say...