Diagnostic medicine

Grace wrapped her hand around David's cock, stroking it slowly. He liked that part, at least.

He was less confident about the machine the other nurse was wheeling toward him. Its appearance was somehow a combination of a filing cabinet and R2-D2. A flexible arm extended from it that definitely looked like it belonged closer to a cow than to him.

He almost made a run for it again when Grace pushed his cock into what she called the machine's "operative device". He decided to stay when her hand slid to his balls. With the press of a button, the machine sprang to life. It firmly gripped his shaft and a gentle suction pulled him inside.

It was the least sexy thing that had been done to his dick since he woke up in this world, but maybe it wasn't going to be so bad.

As Grace turned her attention to the machine, the doctor explained, "the test is calibrated to be done with a moderate amount of non-genital stimulation."

David looked to Grace in confusion, seeing her concentrating on the machine's control panel. He started to ask "what's tha..." as he turned back toward the doctor, but was interrupted by her naked breasts inches from his face.

From above his eye line, she answered, "it means we don't expect you to get off from just the machine," she leaned forward, pressing her nipple into his mouth, "we need to ensure the test is successful."

With a beep, the machine turned on. The gentle suction returned as the sterile tube around his cock gave his shaft a pulsing massage. It wasn't really so different than getting fluffed. He gave the doctor's nipple a playful lick and decided maybe medical science wasn't so bad after all.

Grace leaned next to him and put her hand on his chest. He could feel her breath on his ear. She whispered, "if you think the machine's good, just wait until you're done. You know how doctors used to give kids a lollipop? Well tonight, you're going to give a nurse the lollipop." She pause and whispered so quietly he could barely hear her, "while her girlfriend licks your balls."

"Mmmm," he replied around the breast pressed against his face.

She continued, "you know what else? Sarah wanted us to surprise you, but me and Alyssa have been spending some time with Jordan."

As best he could with the doctor's nipple in his mouth, David asked, "mfff?"

Her finger circled his nipple while she purred, "uh huh. We're both getting really good at deepthroating. You know that double-ended dildo that Maria and Julia have?"

"Mm-hmm," David managed to answer. The Stimulometer continued to massage his cock, buzzing gently as it did.

"We can almost kiss with it between us now."

David could only reply, "ho-ee fuck."

"We'll show you next time we're over... or maybe you'd like to take a little more active role in the demonstration? I bet you'd love feeling my tongue on your balls when your cock is down my throat."

He heard the doctor say above him, "nurse, a moderate amount of stimulation please."

Sadly, Grace changed the subject, and whispered, "we're going to The Beaver after work. Alyssa is going to be there, and some of the other nurses. You should come with us."

"Uh-ayy." The machine attached to his cock continued to grip and pulse along his shaft.

"You're not going to believe how well a group of lesbian nurses are going to be able to find their way around your body." She pinched his nipple for emphasis.

David groaned against the doctor's tit as he came inside the Stimulometer. A few seconds later, a series of beeps from the machine indicated the end of this serious and important medical procedure. With a hiss, the machine released its grip on his cock. The doctor stood up and Grace leaned away from his ear.

Grace pulled the machine out of the way and returned to its control panel. The doctor knelt between his legs. She licked the cum that the machine hadn't captured from his cock, apparently waiting for Grace to deal with the technical issues.

After swallowing the last few drops of his load, she wrapped her mouth around his shaft and started hungrily sucking him. Her mouth definitely felt a lot better than a plastic tube. David had been impressed at how well she sucked him right after he woke up, and this time was no different.

Grace finished whatever she was doing with the Stimulometer and turned to watch. She smiled when she made eye contact with David, pointed at him, mouthed "you", pointed at herself and mouthed, "me". She opened her mouth and tilted her head back. She pointed a finger at her lips, and traced a path down her chin and down her neck, demonstrating exactly how far she thought she could take David's cock.

The lewd offer and the doctor's cocksucking skill pushed David over the edge. He held eye contact with Grace as he started to cum.

The doctor moaned happily as he filled her mouth. With his second load swallowed, she turned her attention to the machine's display.

After a few seconds to catch her breath and read the output, she summarized, "required stimulation was well within the normal range. Captured 9.2 milliliters. Everything looks good," she turned to him with a smirk, "and tastes good."