"You will regress to 12 years old, but still remain 28 in your head. However, you will act like a toddler. Your clothes will shrink with you."
Aiden tried to protest through his the stinky pacifier that only he could smell or taste. His changes only took a matter of seconds. He had now the body of a barely pubescent boy. Mark decided to do one better.
"You have no bodyhair what so ever. And you tiny dicklet shrinks to half it's current size. Anyone who sees you will think you're just a perverted boy who gets off on being embarisment. And you will get off on it. You'll very easily prematur ejaculate at the slightest embarisment and it will be very apparent that you've just creamed yourself to everyone around you." Instantly, Aiden's legs pressed together in his onsey and he began to moan as he very clearly came in his diapers. Mark laughed maliciously.
"You still can't speak in anything but baby language, and that only when you don't have your pacifier in, but must try to answer honestly if asked if you just came." With that, Mark pulled out what looked to him like a simple pacifier.
"Aiden, did you just have an orgasm?"
"A cum cum in ma dapath," he answered honestly, almost proudly. The end of his sentence turned into a moan as he came a second time from the humiliation. Mark laughed as he held the sweaty foot tasting pascifire back to the 28 year old trapped in a smaller body. Aiden took it back in his mouth almost eagerly and began to suck on it vigorously, as if to make up for having it out. Mark only noticed the hint of revulsion and reluctance in Aiden's eyes because he was looking for it.
"Maybe every time you get embarrassed is too often. Let's change that to maximum once an hour. Also, instead of the cum vanishing into your self cleaning underwear, it will instead secrete from your pascifire. Yes. Every time you cum your tiny dick won't actual produce anything, but your pascifire will squirt instead."