His sister science project.

His sister had needed his help for a science project a month before. K-T had been suspicious of this, his sister loved to do things that ended up in a lot of embarrassment for him. The description of the project seemed harmless and his mother had made him feel guilty for not helping his sister in what would be something requiring little to no effort on his part. The extra credit for his science class for his participation sealed the deal.

Her project involved tagging an animal with a small GPS chip and following the patterns in its movement. Once he had agreed to help he discovered that her genius idea was to do her study on a "teenage human boy" specimen. All he had to do was to swallow a small GPS chip coated in a special substance that will stop it to pass through his system until it was degraded and wearing a fitbit that would record his vital constants for a few weeks and he would get an extra credit. He would also have to attend his sister's presentation after she finished her study, a little price to pay.

His sister had been unusually nice to him and had not insisted on any weird requirements during the study, she only told him to live his life like usual.

Everything went well until the presentation where he discovered that half her work was a deep analysis on his his arousal and masturbatory habits, using his heart rate or blood pressure as indicators. Getting his large dick hard had a noticeable effect on those and the whole class could clearly see every boner he had for three weeks and any time he had beaten himself off, all exposed on a very precise color graph made by his sister.

He had had little choice to stand in front of the class while his sister described with how much regularity he dealt with his morning wood or how he spent nearly every PE class completely hard.

An humiliating experience, but all considered a short one and far from the worst he had endured. While what was talked about was embarrassing he at least was fully clothed as it happened and the study was just data, no exposing picture of him had been included, just a small portrait of the subject.

Now what happened after it has been troubling but barely an inconvenience. The chip his sister used was designed for long term study on large animals with powerful digestive tracts. The chip that would have gone out of an elk or bear in little over a month, would probably take close to six for K-T.

She had made sure that the chip would be safe for a human before giving it to him. So when he found out that he would have to keep it longer he didn't really care about it. He would just poop it out a bit later than planned, who cared? These chips were single use anyway and there was need to do gross stuff to retrieve them.

He hadn't planned to have to take a plane and once the news of the trip arrived he had completely forgotten about the chip.

The TSA agent had finished the pat down and found nothing. She had taken out a wand, but because the chip was emitting it set off everywhere she put it on his body.

"Please, sir, I'm going to ask you to strip down to your underwear and go back through the gate."

K-T didn't want trouble for his vacation by getting into an argument with the TSA and he knew that he was going to spend two weeks wearing a swimsuit nearly all day, some a lot more revealing than his boxers.

He simply stripped down to his boxers, handing out his clothes to the agent who put each item in a plastic zip lock bag.

Of course the chip in his guts set off the gate again and K-T was beginning to fear what would happen next. The next logical step was to ask him to remove his boxers, but they surely wouldn't ask him to do it in front of everyone.

"Sir, the machine tells us that you have an electronic device on. We can't let you on board with some unidentified electronics. Please hand to us whatever you are hiding in your underwear. If you don't do it yourself you will have to be strip searched."

"I don't have anything in my underwear, what you are looking for is inside of me. It's a chip I swallowed for my sister's science project." he said.

"Sir, we can't take people on their word when security is at stake. Please remove your underwear."

"Could we do it somewhere private? Everyone will see me here." as he said it he realized that by now a lot of people in the line behind him had their phones out, including his sister and aunt.

"Due to complaints about sexual harassment and inappropriate conduct new regulations indicate that you can only be strip search in private by a TSA agent of your own gender. The only male agent on duty is home sick today, so we can only inspect you if witnesses are present. And since we are short staffed no one can leave her post today. Now hurry up sir, or these poor people waiting might risk missing their flight. We can't let anyone through while a search is in progress because we might miss something if we are distracted."

"Can you at least tell them not to film or take pictures?"

"I don't have the authority to do that. My only responsibility is to control the passengers, I can't give them order unrelated to their being controlled."

His mother had taught him from a young age to always obey authority figures and with her being a few ranks behind him in the line he knew that she would be a lot more angry seeing him disobey the TSA,
jeopardizing their vacation than seeing him strip down in public while being ordered to do it.

He shyly removed his boxers, fumbling around his cock to try to keep it hidden using one free hand, a task he knew from experience that he was doomed to fail at. The TSA agent took his last claim to decency and put it in yet another zip lock bag. Handing the set of bags to another uniform lady who left with them and disappeared through a restricted access door, possibly going to test them some more.

His newly free hand had joined the other to hide his junk, but only for a short while.

"Please Sir, put your feet apart and raise your arms on the sides."

And that was it, K-T was now completely exposed in front of everyone, to the shock or delight of many waiting passengers. This was done and K-T was mortified, especially with Lily waiting just after him in line. He wouldn't say that he did not want her to see him naked, but he had imagined that the first time it would happen would have been a more intimate and reciprocal affair.

At least it's not like he was ashamed of his body, he wasn't He-man, but he had some amount of visible muscles, a great tan (the amount of time he spent naked had made any tan lines very difficult to discern) and he didn't have to blush at what was in his pants (on the occasions he got to wear pants) at 7 inches soft and over 9 hard, it made jealous most of his classmates.

Having now proved that he had nothing on him, the worst part was over.