Shuri gives me hands-on examination

"Thank you for agreeing to this, Chuck," Shuri said as I lay on the examination table in her lab, covered by nothing but the thinnest hospital gown. "This Phalarsenasthenia all you colonizers claim to have is like nothing Wakanda has ever encountered. Our medical technology has been curing theoretical diseases for decades now, but even we can't seem to figure out this one."

She pulled out a device that was obviously just a Hitachi wand with some sci-fi bits glued on; "This is called a vibra-sensor. It's perfectly safe. I'm going to scan your vitals with it, working my way down to the... afflicted area. Okay?"

I nodded, and Shuri went to work. She rubbed the wand against my temples first. That was... odd.... but not unpleasant. Then she moved on to my chest, massaging my pecs before running over my flabby abs, which jiggled more than I'd like to admit.

"Hmm," she muttered into a recording device as she worked, "Cholesterol is high, but that's true for all colonizers... Blood pressure is slightly elevated, too; doctor's office jitters? Don't worry, I'm very gentle."

Then she got to my crotch, holding the pulsing wand right at the base of my shaft. I'd never tried toys before, but that was the fastest I've ever become fully erect.

"Huh..." Shuri said, checking and double checking her readings. "That's odd. Let me see..."

She reached her free hand under my gown, questing for my thick shaft. She felt her way up and down my length, then investigated my scrotum for a while.

"Nothing out of the ordinary here," she said. "A little big, for a colonizer, but nothing a Wakandan couldn't handle. Sit up, please."

I sat up, dangling my legs over the side of the table. Shuri pulled me forward until my bare ass was right on the edge, then flipped up the hem of my gown and exposed my junk to the cool lab air.

"The testicles respond properly to changes in temperature," she noted. "The head of the penis is purple, likely from an excess concentration of blood. Subject should ejaculate soon."

Shuri lifted my dick and laid it back against my stomach, then held my balls out of the way to press the "vibra-sensor" against my sensitive taint. She rubbed it gently back and forth from the back of my ball sack to the start of my ass crack. My dick throbbed, **** for attention, but Shuri slapped my hand away when I went to stroke it.

"Hands off!" she chided, "I can't have you ejaculating early and ruining my research! Now, stand up with your legs apart and bend over across the table."

I obeyed, presenting my asshole nervously to the young scientist. She spread my cheeks to examine my sphincter for a moment, then pressed her pulsing tool against it.

"Just as I thought," I just barely heard her say through the fog of pleasure. "Your prostate is massive. They're usually bigger in colonizers than in Wakandans, but this is unprecedented. How do you manage to urinate at all?"

Without waiting for an answer, she removed the "vibra-sensor" and poked at my opening with her manicured fingertip. She seemed to remember something, jumping up to grab a latex glove and putting it on before sucking that index finger into her mouth. When it was thoroughly coated in spit, she ventured it tenderly into my ass, inching her way along, looking for my prostate.

I knew the moment she found it; I nearly went blind.

"Oh, SHIT!" I gasped, "Th-that's... YES! N-never stop doing THAT!"

"The colonizer's prostate is very sensitive. Is this normal, or a symptom? Must ask T'Challa sometime."

She wiggled around for a while under the pretense of gathering data, but I think she was beginning to enjoy herself. I certainly wasn't going to complain, but then she pulled her finger out.

"H-hey," I protested, "I was so clo-OSE!"

Before I finished my sentence, something wet and warm filled my puckered asshole. I looked back, and Shuri had buried her face between my cheeks and closed her eyes as she dug her tongue as deep into me as she could reach. When she hit my prostate, I achieved fucking Nirvana. All consciousness of who or where I was melted away, and my entire existence was pure orgasmic pleasure. My cock erupted like a fire hose, spraying a constant stream of thick, hot cum that lasted long enough for Shuri to run across the room, grab a vial to collect a sample in, run back, and fill it to the brim before it even slowed down. When, after what felt like hours, the greatest orgasm of my life subsided, I heard the doctor record her final conclusions;

"Subject has produced an estimated ten to twenty milliliters of ejaculate; a decent load for a colonizer, though in Wakandans it would raise concerns of low virility. The sample is very thick, with a potent odor and -- a sweet flavor. Sperm count is incredibly high, for a colonizer or a Wakandan; even trace amounts introduced to a fertile uterus would almost certainly result in pregnancy. Further research is clearly needed."