Chad was freaking having been shrunk down to insect size and dropped into Karl's underwear. He landed in Karl's pubic thatch just above his massive penis. Oh. No. This was bad.
Chad did pound on Karl in anger only to feel the flesh beneath him swell and grow. Chad ended up at the bottom of the briefs as Karl walked. To Chad's horror Karl sat down. Apparently in his car because the engine roared to life. Chad managed to wriggle out from beneath a butt cheek into the gap between the butt cheeks. He prayed silently, "please don't fart..."
At last the car stopped and Karl stood. He hadn't farted. Chad would have been relieved, except as he stood Karl's butt cheeks together. Chad was upside down and squished between the two huge mounds of fat and muscle. He was disoriented, but hr thought he knew the way out. He wriggled and pulled himself "forward toward the exit." Suddenly, je touched warm stinky dampness. Wrong way! Chad did a swimmers maneuver to turn and kick off the wall. But in this case, his feet pushed against Karl's moist rosebud, which twitched and sucked Chad into Karl's hole up to his waist. Karl flinched at the minor intrusion and laughed. By the time he got home and stripped Chad was up to his armpits. He saw Karl's building sized tablet in camera mode counting down to take a selfie. Flash, Flash, Flash.
Then Karl's thumb and index finger extracted him, dropped him in a stoppered half filled with water. It was like a pond or Olympic Pool to Chad in his shrunken state.
"Last time you will try topping anybody, Chad." Karl's finger tip dunked him. Then Karl extracted him with his finger and thumb. Karl said, "We both have big day's tomorrow, Chad, so time to tuck you in and go to bed."
Chad's scream was too high pitch for Karl to hear as Karl dropped tiny Chad from one hand into the gap between his cock and foreskin. Then Karl released his foreskin, it snapped back pinning Chad in the warm envelope of flesh. Karl pulled his briefs up, and hopped into bed.
In the morning, Karl got up, pulled open his briefs to collect Chad, and laughed. He had had a wet dream last night. Chad was glued with dried cum to the front of his briefs.
"Guess, I won't change my briefs today after all. "
Chad was confused and terrified. Last night he experienced his little dog self mounted by Attila, then he found himself freed from the foreskin and tumbling toward Karl's glans as sleeping Karl humped his mattress. Chad ended up drowning in Karl's semen. It was a nightmare. He was pressed between Karl and the wet briefs. The heavy cum hardened imprisoning Chad to the briefs.
Karl drove to the clinic, and walked in.
"Hey, can I see my little doggy before the doc puts him on the table?"
"Of course, Karl, Chad has been whining since I got here this morning. I guess he missed you," the receptionist said, "But the doctor is scheduled to take care of Chad in half an hour, so we'll need to prep the dog in about 15 minutes."
Karl knelt in front of the cage. The dachshund was whining and shivering. Attila lay in the back of the cage snoring.
"So, Chad, miss me. How was your date last night?" Karl asked. The dog stared dumbly at Karl until the nanobots translated the words heard by tiny Chad into the mind of dog Chad. Then the dog snarled. Karl laughed and reached into his crotch and extracted tiny Chad. "Bet you missed your human bit, doggy? Remember when I said that the dog you would probably eat you to get you back inside? Well, Chad, that's exactly how it's done. C'mon, boy, eat yourself up!"
Karl held out tiny Chad between his index finger and thumb out toward the caged weiner dog. He thrust his muzzle between the cage wires, and snapped up his tiny treat.
Tiny Chad screamed as he slid across his own tongue and down his own throat. The link between their minds grew stronger. He had just swallowed himself. He was living in a horror film. Karl was Dr. Moreau and Dr.Cyclops all rolled into one.
Karl tapped his tablet to instruct the nanobots to merge tiny Chad back into doggy Chad.
As Chad felt his body dissolving in his stomach, he thought he was dying. But he dissolved to quickly and was reintegrating with his dog body, not being digested. He felt an odd sense of relief.