2B needs help with calibration

"You see, little 2B here needs help..." Mai slips behind the expressionless android and snakes her arms around her thick hips. "The world she comes from doesn't have any humans. After arriving here, she has been yearning to experience a cock. Alas, humans are much too fragile for her! If she clenches her vagina from an orgasm, she might well cut off the poor lad's penis!"

Gary raised an eyebrow, not expecting such a scenario to fall into his lap so soon. Looking at 2B's curves that exceed most porn stars, as if she was designed with the prime directive to seduce men, Gary's cock was already stirring to life.

"As a man, I will always aid those in need of my help."

"Hah! Quit acting like you don't want to bang her. I can tell where you have been looking, and it sure isn't our eyes! No matter, it's perfect that you're a pervert."

"Thank you very much for your assistance, Gary," 2B said monotonously. "We can perform the calibration in my room, where I have a bed capable of withstanding the impact forces involved."

2B and Mai led the way to a simple, lightly furnished bedroom. Gary silently muttered an apology to 9S as he stripped down for the impending seismic activity.

"Rias won't be joining us?"

"Jeez, you already have the two of us and you want more?" Mai asked.

"My bad, sorry."

"You better be. Anyway, I'll just be here to help little 2B out... although that cock is giving me second thoughs."

She was looking straight at his hard, throbbing member, with a girth straight out of a hentai.

"So this is what a penis looks like in person. It looks so menacing," said 2B. She was still wearing her body suit, but with how thin and tight the outfit was, she might as well be naked.

"The first thing you want to do is to give him a blowjob. Men absolutely love it," Mai suggested. Gary wasn't sure why she was acting as 2B's sex mentor but he wasn't complaining. The silver haired beauty opened her mouth and gobbled up his cock.

"Ooh fuck. That's insane," Gary complimented. His thick cock was sliding into her mouth effortlessly, with her tongue was working magic at the same time. Her skill was impressive for someone who was allegedly inexperienced.

"Wow, she's sucking like a pro. Did you really need help at all?"

"Yes. I have analyzed 8,162,640 videos of sexual acts, but it is difficult to understand what real people actually enjoy. My conjecture is that many of the actors in these videos are faking their expressions."

"That's true. Well, you're doing a good job. Gary looks like he's having the best day of his life!"

"I can confirm... I'm having the best day of my life," Gary said with a faltering tone.

"Now now, 2B, let's cool down. You're not going to be able to calibrate your pussy if make him cum now!"

Mai was incorrect on two fronts. First, his upgraded penis was withstanding 2B's divine fellatio very well, such that he would not cum if he did not want to. Second, even if he were to bust, Gary was sure he could will it back to full erection, especially with two mind-blowing gorgeous women before him.

Gary felt no need to correct her, not was he disappointed that the blowjob ended. After all, the main menu was next.

"Please, lie down on the bed. I will take care of everything."

Gary noticed that the bed actually had a steel frame, and felt firm and solid with little give. He laid down in the middle, his cock pointed skywards. 2B took off her bodysuit and stepped onto the bed, giving Gary a close look at her perfect, curvy body.

"Jesus Christ, those tits are perfect." Each were twice the size of her head, yet perfectly shaped and topped with big pink nipples.

"Oh? What about these?" Gary's vision was suddenly blocked by a massive round shape. He smirked like a little boy and grabbed the giant bazongas Mai had unleashed in his face. Het breasts were just as big, but so soft that his fingers were sinking into her flesh.

"I will commence calibration. You must inform me if I am hurting you," 2B said. Looking on from between Mai's tits, Gary watched in anticipation as 2B squatted down, impaling herself onto his enormous cock, her movement smooth and effortless.

Gary's eyes rolled back. She was too tight! His cock felt like it had been jammed into a tight opening no wider than a finger. The one saving grace was that it was amply lubed and yielded slightly. If he wasn't indestructible, Gary had an inkling that his precious manhood would have been crushed. At present, it was equal parts pain and pleasure for him.

"Too tight! Loosen it more!"

Immediately, Gary felt the vice like pressure around his shaft alleviate. After a bit of back and forth, they settled on a comfortable setting - still tighter than the average human vagina, but fuckable.

"Oh, you do not want to know what happened to the last guy who claimed he could survive 2B's ass," Mai added.

Indeed, he didn't. When 2B brought her hips up and slammed it down again, the steel bedframe groaned.

"Uhhh, 2B, are you trying to kill me?" Gary asked.

"My apologies. I will reduce the velocity of that movement by 80%."

After a few more mishaps, it finally clicked and Gary began to feel real good. From temperature (which ranged from corpse cold to oven hot) to speed, 2B had finally learned how to have sex that possibly wouldn't kill a person. Gary watched as his cock slid into her pink folds over and over, her movements precise and unerring as the robot she really was. It was like he was getting milked by a contraption - a really sexy contraption. Her giant tits bounced with her movements, and Gary couldn't help squeezing both girl's tits in each hand.