For the Sake of... Efficiency!

While this was all fun in his head, just standing in line without anyone ever getting to know what size he now truly was, was... boring. A part of him wanted to just pull out his new slab of meat and show the girls who's king now. No longer Mike with his 10 inches, it was John with the tower of a cock. Eventually he decided for a change of events, and with a snap of his fingers the whole class was back in class, with the boys standing at the front. And a sly yet slightly nervous grin hushed over his face, while the teacher explained the new procedure.

"So in summary: the nurse will be here soon, the pills you took at the beginning of class should be affecting you by now, so we can get an accurate measurement." John looked at his teacher Mrs. Woods, a woman in her 30's, who didn't look all too shabby herself. He had some ideas what he could do with her, but in this wet dream version of his day there were bigger things to come. And just like she heard his thoughts, the nurse entered.
"There you are!" his teacher introduced her "As you know nurse Annie is a professional, so all she does is for professional reasons." The boys attention were however glued at the almost basketball-sized tits Annie sported. And she had them not only by chance, but for a very special reason.
"As always." the nurse said with a smile. "You all took your pills?" she asked the boys, who nodded in unison. "Then for the next step please remove your pants and any underwear, so we can get this over quickly."
There was a moment of hesitation, but the boys complied. Under the curious gaze of the girls in class, one boy after another lowered his pants and boxers nervously, but John's magic made sure no one would freak out about this. The girls were mostly interested in "Big Mike" lowering his pants and showing off his member, but when John let down his pants there was a sudden silence in the room, followed by whispers a moment later.

"I see we have some... outstanding sizes in this class." the nurse said with a hint of arousal in her voice. "Well but you know we need to measure them erect, so the next step I assure you is completely professional, but necessary." And with that she removed her top, and allowed her gigantic tits to dangle free in all their glory. Under normal circumstances that would have given every boy in class already a boner, but with the added Cialis every bit of choice has been removed from that option. Under heavy breathing and some moans, all members presented rose up rapidly, while the nurse - professionally - worked her naked tits in a very sexual way. A good minute later every boy sported a raging hard-on, that thanks to the still well presented boobs and the added chemicals would last for a while now. The eyes of the girls were however locked onto what John presented: a dick now rock hard reaching up almost to his collar bone, with massive balls hanging below.

When the nurse approached the first boy, it took the rest of them considerable effort to not start masturbating right there. But the instructions had been clear: the nurse would get them to orgasm, they were not allowed to do it on their own. In the meantime Annie measured the first boy, cupped his balls, took some notes, and then asked: "Hand, tits or mouth?"
"Hand please." he answered nervously. A poor choice, John figured, but maybe he was just too scared. Annie however - as a professional - knew how to handle it, and with a firm look into his eyes, an excellent presentation of her rack, and a very skillful set of hands, she had the guy shooting his load into the measurement cup in no time under heavy groans.
The second boy was smarter and opted for the blow-job. Something Annie performed even better, and had him over the edge in unter 40 seconds. She proceeded from boy to boy, Mike obviously asking for a tit-job, till she arrived at the candidate the whole class had been waiting for: John.

"I'd say blow-job is out of the question." she stated the gigantic rod he sported. "18 inches is definitely a new record. And those balls... they are literally off the chart, wow!"
"I am a very lucky guy." John commented with a grin "Also: tits please."
"I figured." Annie said with a grin that made it clear that she was enjoying her job. In awe he watched her go down on her knees and sandwich his very needy rod between her massive rack. Having his wet dream fulfilled like this felt heavenly, and the way she handled that dick, that sexy smirk on her face, and those yes that looked up... she'd be the first girl to get an Oscar for a porn movie.
"Fuck..." John groaned when he felt himself slipping over it. He had really tried to prolong this as much as he could, however his statement that Annie could get any boy to an orgasm in under 2 minutes held true.
"Language!" Mrs. Woods shouted, but it was too late. Skillfully Annie directed his dick to shoot right into the measurement cup, however when he filled it up half way already with just the first load, she knew that size had been a poor choice. The second one filled it to the limit, and the third and following caused a mess in all directions, including Annie, John, the guy next to him, and most of all the floor.

"Damn, you are one productive boy." Annie said with some of his juice still dripping from her face.
"I am sorry." John lied, as he regretted nothing of this fantasy he had made cum alive.
"No worries, that's part of the job." she said and wiped her face with a tissue. "I estimate that was about a gallon." she took a note. "Anyways, thank you all for participating. The erection should fade within the next hour." she concluded the exam "A bit sooner if you manage to not think about my tits." she added with a smirk. And with that the boys begun to package their package back into their pants, some of them also beneath their shirt.
"That's gonna be a very uncomfortable full hour." Jason mumbled when he stuffed his 5 rock hard inches back into his pants.
"I am sure it's gonna be a bit more tough for some of us..." Frank said and hinted at John, who was literally bulging his shirt now in a very obscene way. John had troubles keeping a straight face, as this was unfolding exactly as he had wished, including the prolonged erection, so he could show off a bit more with a good excuse. And as far as he could tell, the girls in class enjoyed this show at least as much as he did...