Baymax dragged his massive hands across Hiro's sides, and then slipped his hands into his pants, pulling them down slowly, underwear and all. He then slipped them into Hiro's shirt and pulled it off too. Hiro stood in his cold room completely naked, as the white blob in front of him stared at him with half opened eyes. "Allow me to scan you." he said. Hiro stretched his arms out as Baymax surveyed his body. "Scan complete. Your body temperature is low, and you appear to be very aroused."

"On a scale of one to ten, how would you rate your arousal?" said Baymax. Hiro was too tense from arousal to speak properly. "About a 6, Baymax." Baymax tilted his head to the side. He started glowing orange and walked towards Hiro. He grabbed Hiro by the shoulders and pushed him back onto his bed. Hiro shuddered as he felt Baymax's warm vinyl body press against his body, as he lay on his bed, legs bent over the side, with Baymax partly laying on top of him. Hiro's crotch was pressed tightly against Baymax's warm belly.

Baymax started to move up and down, allowing Hiro's hard cock to rub against the folds of his vinyl. He slipped his arms under Hiro, supporting his weight on his arms. Hiro grabbed the vinyl of Baymax's arms. "Oh Baymax… please take me." Baymax picked Hiro up, and started grinding against Hiro's butt. Baymax wrapped one of his hands around Hiro's cock and started a gentle electrical current generated from the defibrillators in his hands. Hiro's cock was dripping with precum. Baymax started to move his hand up and down Hiro's shaft, as he pressed his massive body against Hiro's.

"On a scale of one to ten, how would you rate your arousal?" said Baymax. "Ab- ab- about an e- e- eight, B- b- b- Baymax…" stammered Hiro, as his breath rate and heart rate continued to increase. Baymax scanned Hiro again. "You appear to be experiencing an increasing rate of epidermal moisture. An eight on the scale of arousal you say? Would you like me to remedy this via stimulus of the prostate gland from within your anus?" Hiro could hardly speak. "Y- y- yes B- b- b- Baymax…"

Baymax bent Hiro over onto the bed. He grabbed Hiro's ass and started massaging them with his giant hands, pulsating the current like a TENS unit. Hiro's asshole clenched and released, clenched and released, and clenched and released. Baymax's hands released a lubricant, which coated Hiro's asshole and prepared it for entry. "Lubricant is necessary to prevent damage to the anal and rectal walls."

Baymax pushed one of his fat fingers against Hiro's anus, sending a gentle electrical current flowing through his rectum. Hiro really liked e-stim. "Would you like me to electrically stimulate your prostate gland now?" said Baymax. Hiro's face was dripping with sweat. He looked over his shoulder at Baymax's face—his half-moon eyes and the line connecting between them. Such a basic face was surprisingly able to convey Baymax's own arousal with much expression.

Baymax stuck his massive index finger into Hiro's butt. "Ohhhh Baymax," moaned Hiro, "oh Baymax yes! YES!" He slowly pushed deeper into Hiro, as he asked his formulaic question again. "On a scale of one to ten, how would you rate your arousal?" Hiro grabbed his bedsheets "Nine, Baymax… oh yes…" he moaned. Baymax's finger started to vibrate. Hiro could feel Baymax's huge, soft, slick finger worm around inside his butt, gently shocking and vibrating against his prostate gland. Hiro started to drool. Baymax knew exactly where to pleasure Hiro, as he knew exactly what Hiro's bodily parameters were.

Waves of pleasure-inducing neurotransmitters and endorphins coursed through Hiro's blood. "Good robot…" said Hiro. "Yes, Baymax! Scan me, Baymax! Scan me!" he begged. Baymax scanned Hiro. "Your heart rate is 187. You're sweating profusely, and there is a large volume of blood in your genital regions. Your endorphin and neurotransmitter levels are very high. You are very aroused. I suggest additional stimulation." Hiro moaned at the idea that Baymax was able to violate his privacy and measure his most intimate parameters.

Baymax reached around with his other hand and started giving Hiro a hand job, using the same electrical current and vibration pulsating in his ass. Baymax pressed himself against Hiro. "On a sca.." Baymax was cut off by Hiro. "TEN, BAYMAX! OH! YES! OH BAYMAX! OH BAYMAX! OHHHH BAYMAX!" He screamed, as he let out his load all over Baymax's hand. Baymax, seeing that Hiro was satisfied, felt a jolt of electricity run through his processors, started calling out to Hiro and started blabbering gibberish words in his own orgasm. Hiro had programmed him to orgasm whenever Hiro was satisfied, thereby creating simultaneous orgasm between he and Baymax.

Baymax pulled his finger out of Hiro's butt and dragged him onto the bed, letting him lay on top of his massive and soft belly. His hand dripped lubricant and Hiro's cum onto the bedsheets and Hiro's body. Hiro lay on Baymax's belly, panting, as he gave him a huge hug. Baymax stroked Hiro's face. "Are you satisfied with my care, Hiro?" Hiro smiled. "Yes, Baymax. I am satisfied with my care."