It looked like Tucker's lifelong wish of proving we were not alone in the universe had completely misfired. The hitchhiker would've been happy if he had captured an alien or two to show off to the media but the tables had turned and now Tucker himself was the peculiar specimen to be examined by prying eyes. What had the red alien called him? A "Delta Class animal"? He had no idea how many classes of animals there were but it sounded like he was at the very bottom.
The cubical cage had rapidly sucked the Delta Class animal AKA Tucker into its insides the very moment the red guard had opened it. It had been a painless process, but to the horror of the imprisoned human his clothes had not been absorbed with him.
"This can't be happening! I have to get out of here!" The cage was designed for animals at least three sizes smaller than Tucker and for him to get out of his fetal position was quite an ordeal. He struggled to uncurl himself and inspected every corner of the cage for any improbable opening but it was futile.
The cage holding the naked human stood there in the middle of the spaceport looking inconspicuous not unlike lost luggage until someone came over and collected it. Who had collected it? Tucker had no idea because he had gotten stuck with his ass against the little green opening, obscuring the little visibility the captive had available.
The cage was put in a pile of similar-looking containers and Tucker had to wait for what seemed to him like hours. He could have taken a long nap, if only he wasn't so uncomfortable in this claustrophobic prison and his unnerving need to go to the bathroom wasn't slowly but surely increasing.
An alien with a frog-like head and a pot-like belly wearing a labcoat entered his office. "Let's see what beautiful specimens I have the pleasure to work with today!" He grandly announced to nobody.
Fronk was an expert veterinarian that fought for animal rights and always treated them with utmost care... Or at least, that was the case with Alpha and Beta Class animals. He considered anything lower than that to be a total waste of his magnificent talent. That's why he groaned when he saw the Delta Class cage standing on top of the pile.
"Yuck..." The frog-headed man could only say, sticking out his tongue as he did so. "I'll just do the procedure as quickly as possible so this thing can be incinerated, slash turned into low quality meat, slash repurposed into something that's less of an eyesore..." He pried open the green lid of the container and the human was expelled out from it in all of his naked glory.
Tucker was once again disoriented. One moment he was with his dirty hitchhiker's butt stuck against the green wall of the cage, the very next moment his fat butt was against the frog-headed alien's nostrils.
Fronk looked at the set of hairy cheeks with disinterest. "Mmm, what an ugly-looking Delta Class. It's so fat and gross. I mean, where are his eyes?" The alien vet took out a pair of pliers from the pocket of his lab coat and systematically spreaded apart both globes of meat. "Oh, found his eye." He announced when he saw Tucker's anus winking at him.
Tucker was used to being called gross and fat. He was a hitchhiker after all, he didn't have the best hygiene or the healthiest eating habits. But it was the first time someone was mistaking his asshole for his actual face. It certainly was a new low.
The human was so thoroughly embarrassed by his nudity and the pliers exposing his most intimate body part to the alien that he found it difficult to react. Maybe he should try and talk his way out of this...
"Err... Excuse me..." Tucker shyly said.
Fronk quickly covered his nostrils with hands in disgust. "Ewww! This repugnant piece of cattle just farted very loudly!"
"I didn't fart, this is my voice and-"
The frog-headed man rapidly put something on Tucker's mouth. Worryingly enough, it was shaped like a plastic dildo. But there were some spots of very icky-tasting stuff covering its surface...
"Thank goodness I had a spare fart-proof buttplug. And it's practically brand new, it's only been inside six alien buttholes this week."
"(It's been inside WHAT?!)" It's what Tucker would've said if he wasn't currently gagged by the used buttplug. He tried to yank it off his mouth but he found it impossible to remove.
"Don't waste your energy, that anal plug is quite special, it can't be removed from your dirty asshole by yourself no matter how much you try." The alien said looking sternly into Tucker's asshole, truly believing that's where human vision was provided.
"Mmmph! MMMMMPPPHH!" Tucker's muffled cries could be faintly heard as he tried to remove the dirty buttplug gag from his throat.
"Now, stop resisting unless you want me to put more restraints on you... Now, be a good animal and sit down on the table..." Fronk said, pointing at a scary-looking operating table in the center of the small alien clinic.
This vet was crazy! He couldn't even tell a face and a butthole apart! If Tucker does as he says, who knows what he'll do to him! ...Then again, resisting and trying to escape back into the alien spaceport naked and gagged completely silent as he was didn't seem like a very smart plan either...
"Your species has very peculiar-looking chins, indeed." Fronk said as he squeezed the hitchhiker's heavy balls from behind. "And what's this floppy thing underneath...?"
Tucker had to make a choice. And fast!