Jen takes the gun, fiddles with the setttings, and grins as she fires. The two plump individuals begin to get more plump, their clothes stretching with their growing forms as best as they could. They each gained thick neck flab and their bellies swelled outwards out of their shirts, revealing deep set belly buttons in a mound of flesh.
In a matter of moments, where once two skinny kids sat were now two 500 pound lumps of fat, farting and burping in between kisses and giggles. They were none the wiser.
You took the gun back and changed the setting, and aimed it at the girl. With a pull of the trigger, you watched as her skin became greasy and pockmarked with acne, and her well kept hair grew longer and unkempt. Her clothes began to have stains from both sweat and other substances, mostly food. The girl's nose swelled larger and wider and her lips thickened to a point past bee stung, while her straight teeth went all crooked as if she had never had braces. The teeth then had a yellowish tint to them. She let out an earth shattering burp as she giggled.
Another blast at the guy, and his changes were more subtle. His clothing remained, and he didn't become much of a slob, but in his mind, he loved slobs, and they were a huge turn on for him. Thus, he had found the perfect girl for him. The two, former simple high school lovers, were now wild and crazy and would probably stay that way for a long time to come.
"What did you do to him?" Jack asked.
"Well, he has a slob fetish now. I figured that might be something special." You added with a wink.