Immediately after the utterance of their safe word, the Doctor stopped what he was doing, got up and went to Rose.
"Are you alright, Rose? Do you want me to take the speculum out?"
"No, it's not that," she told him, blushing beetroot red. "I'm just not comfortable with you putting the thermometer in my bum." The Doctor sighed and kissed her.
"I'm sorry, Rose. I didn't mean to startle you. I've got lots of lubricant and I promise I'll be as gentle as possible. It's only a little rectal thermometer." He held it up to show her. Rose felt a bit silly, once she looked at it. It was narrower than even her littlest finger.
"If you want, I'll do it to myself first?" the Doctor suggested. Rose looked a bit gobsmacked that he wanted to do that but he looked quite eager, so she nodded sheepishly.
Finally freeing himself from the restriction of his underwear, the Doctor hissed at the rush of air to his sensitive flesh. He lubed up the thermometer and stood with his feet apart, squatting slightly. Slowly and carefully he pushed the small rod, much further than was necessary, inside himself. His cock twitched at the welcomed intrusion. "And we just leave that in for a few minutes," he enthused, like he was giving a cooking show, or something and leaned in to snog her softly.
Rose chuckled into the kiss, amazed that he'd done that for her. When he pulled back he was grinning at her and had his hand on his erection, which was weeping precum, giving it some of the gentle friction he needed. Up until now, he had been considerably restrained from touching himself. Ever the professional.
"I think I can go ahead with it now," said Rose, excited to try it for herself now.
"Really?" the Doctor questioned, sternly, not wanting her to do something she wasn't comfortable with herself.
"Yup!" She grinned.
"Okay, let me just take this out again," the Doctor chuckled and whipped the tube from out of his anus.
"What is your body temperature, out of curiosity?" Her interest peaked, audibly.
"16.2 degrees." He assessed the display. "Seems you've got me hot and bothered, Rose Tyler," he accused her and winked, slyly. "Time to check I've done the same to you."
"Er, Doctor?" Rose spoke hesitantly.
"Yes, Rose?" the Doctor asked from where he was putting on a clean pair of gloves.
"You're going to use a clean thermometer, right?"
"Yes, of course," he laughed and took a clean one from its packet.
"Good, I was just checking."
The Doctor sat down in his seat between her legs again and checked with her one more time that she was okay to continue.
"Yes, Doctor," Rose assured him and rolled her eyes a little. She was eager to jump right back into the role-play.
"Very well." The Doctor lubed up the new thermometer and rubbed a gloved hand over her and around her bottom, smoothing it in soothing circles. He rubbed one lubricated finger around her anus to help her virgin hole relax, before slowly inserting the thermometer. "How does that feel, Miss Tyler? Its important you're honest with me about everything you're experiencing. No pain I hope?" the Doctor pressed.
Rose had closed her eyes and was biting her lip slightly, in order to focus on the new sensation. The slight sting as it slid inside, past its metal tip, felt surprisingly satisfying to Rose and more erotic than she had been expecting. She didn't think she'd want to take anything larger up there in a hurry, though.
"It feels nice, Doctor," Rose told him, truthfully.
"I'm very happy to hear that. I know it can be an unpleasant thing to have done," he sympathised and praised to her, "What a good patient you're being." With a strip of medical tape, he helped stick the item in place, for now. It would be unfortunate, for her, if the foreign item were to get lost up her rectum, during their activities. "Just stay nice and still now, while we get a reading on that," the Doctor said, with a tap to her perfectly round bottom. "Let me just check you responses again here?" With a clean glove on, he rubbed two fingers in a repeated circle to her clit, causing her to moan. "Excellent."
He scribbled in his notebook again, this time saying, out loud, what he was writing down. "The patient, Rose Tyler, displays signs of embarrassment and reluctance to accept anal stimulation, both psychologically and physically. It would be beneficial to her current stress levels to overcome this barrier, in order to achieve a more powerful orgasm and to relax her system. At this time, I can recommend the prescription of; further anal stretching digitally, full rectal exam with a speculum and enema should be considered for future treatment."
Rose felt like sinking a little into the couch at his words. Oddly, she found that the slight humiliation was not wholly unwelcome to her, though, the way she gushed below.
The device he took out next looked a bit like a small oxygen mask, with some sort of valve attached and a pumping bulb, not unlike for measuring her blood pressure. "Now, I need to run another important test on you Rose. You may be unfamiliar with this treatment and it might seem strange. However, I'm confident this therapy should resolve some of the underlying conditions that are currently cause for concern."
"Whatever you think is best, Doctor." Rose placed her trust in him.
"I'll proceed then." Using the small mask-like piece, the Doctor covered her clitoris. "This may be uncomfortable initially," he warned her, holding the plastic in place. "But, by the time I'm finished, you should experience some considerable relief." He started to squeeze the connected rubber ball and watched her reactions like a hawk, as the pressure on Rose's clitoris increased, creating an intense suction, to a point that sent her cross-eyed, biting her lip from tension. When he finally popped the device off her flesh again, the Doctor bent over and inspected the result through his specs closely. "Ah, just as I thought," the Doctor announced. "Very swollen and very sensitive." He proved his point, by licking her clit in a broad stroke. Immediately, Rose came undone, calling out his name.
The Doctor took this moment to tug the thermometer in and out of her ass. Ripping the tape off and thrusting the object in and out quickly, before removing it entirely, while she remained in orgasm. In this act of conditioning, he was proving to her, that anal stimulation could indeed be a part a spectrum of pleasures she could experience. "Oh yes, good girl, Miss Tyler, what a brilliant result! That's exactly what I like to see, well done," he spoke with endearment. Taking a swab kit from his myriad of equipment, he took a sample of the white ejaculate Rose had produced in her vagina. Raising his left eyebrow, he inquired, "Did you enjoy my clitoral pump, Miss Tyler?"
"Yes, Doctor," Rose sighed with contentment.
"Its a very useful medical tool and the procedure is one I think you should receive regularly, to maintain an acceptable level of physical health." He sounded very excited about using the device on her.
Taking the sample of Rose's secretion over to the bench, where a microscope was, the Doctor inspected the specimen closely. He stuck his thumb up at her, signalling that she was doing great. He scribbled more of his findings, leaving Rose to wait, legs up and open, while he played scientist.
That last 'test' had been a pleasure for Rose, like never experienced before. The pump had made it so, the Doctor barely had to touch her in order to bring her to ecstasy. She wouldn't mind getting one for her own personal uses, she thought.
When he returned to her, he had a wide grin on his face and was taking the clips off her nipples and from her finger. "I think I've determined your treatment."
"My treatment, Doctor?"
"Yes, I know exactly what medicine you need." Raising both eyebrows, he reached down to grab at his swollen red penis, that stuck out and bounced proud and independently from his body. The Doctor was very cocky indeed.
"And how is to be taken?" Rose asked of him.
"Oh, orally, of course." He shot her a wink.
"I think I'll need that oral treatment right away then, Doctor," Rose responded.
"Not a problem, Miss Tyler, but let me make some preparations to make you more comfortable first."
He took some thin tubing from where it connected to a steel canister. Rose recognized it as a nasal canola, as he placed it around her ears and under her nose. His fingers lingered at the shell of her left ear, sending pleasant tingles through her that built behind her sensitive nipples and pooled in her core. He turned the valve on the canister and she smelt a clean air rush at her, making her a little light-headed. "Its just some pure oxygen for you to breathe, Miss Tyler. It should relax you a bit and ensure you've got enough in your blood, to counteract the side-affects of the medication I'm about to administer."
The Doctor then granted her wish and climbed over her. He made sure he had a good footing and a firm hold to the back of the examination couch, before he began. "Open wide, for me. Say ah," he instructed.
"Ahhh," Rose complied. Seizing the opportunity, the Doctor guided his erect and throbbing shaft into the moist and beckoning mouth of his 'patient'.
"Rose," he groaned her name, upon entering and her tongue began lavishing his tip, tasting and spreading salty precum over his sensitive foreskin. Her lips puckered around his thick and lengthy member, into an unbearably tight ring. All the foreplay up to this moment had left him ready to burst and he had to stop himself from thrusting too hard into her mouth and choking her with his sizable dick. "This is also a suitable test of a patient's gag reflex," he commented on a chuckle.
He began to caress her head and massage her scalp, just as he had earlier. She groaned around him and he slid in up to his hilt a few times, his pubic hair tickling at Rose's nose. He fucked her throat with some force, the white coat he wore flapping, before losing control on a cry and watching proudly as Rose swallowed his cum down. "Good girl, take your dose of the good Doctor's medicine and you'll feel all better soon."
After spilling all of his load, he had to crawl off her naked and spread out form to collapse in the chair, before he fell on her. He just sat for a while, trying to get his breath back, feeling thoroughly spent.