(Usual disclaimers apply)
The two flatmates, Dwayne and Kevin were final year medical students. The men, in their mid-twenties, were very keen rugby players and trained with an Australian University B team.
It was a hot, wet Saturday afternoon and both men were relaxing with a couple of cold ones. Kevin looked up from the newspaper he was reading.
"Did you see this bit about medical students?"
"What?", replied Dwayne.
"It says here that young doctors spend so much time doing politically correct subjects like race relations that their learning of the basics like anatomy has been compromised. Many young doctors don't know the location of vital organs or even where the prostate is". Kevin put the paper down.
"Well I know where the prostate is", said Dwayne. "It's up the bum".
"Yes, but have you ever checked one?" Kevin said. "I know I haven't".
"No", replied Dwayne, thoughtfully. After a long silence he continued: "I suppose we could check each other's?"
"Go where no man has ever been before?" said Kevin.
"That'd be right, but yes".
"I don't know .. you want to put your finger up my shitter? "
"Let's be professional about this. I need to examine your prostate which is up your back passage".
"Back passage?" He moved his firm butt-cheeks on the easy-chair. "My Gran had a back passage in her house".
"Your rectum, then".
"If you insist".
Dwayne got up and retrieved a pair of scissors.
"What are you doing?"
"Trimming my nails and I suggest you do the same. The last thing I need is to get scratched back there". He finished and handed the scissors to his big mate.
"Toss you for who goes first as the patient". He spun a coin.
"Heads" said Kevin.
"Heads it is. Take off your shorts and underpants and lie down on your side with your knees pulled upwards".
"We need lubrication", Dwayne said. "I'll get the petroleum jelly from the bathroom. Probably better if we do the examinations in a bedroom because a bed is higher than that sofa".
A short time afterwards, Kevin was lying on his side in the approved manner. Dwayne admired his friend's muscular buttocks. He'd seen them often enough in the showers after footy practice but this was different, much more intimate. He looked at his mate's hairy crack with its prominent brown fundament and swallowed hard. He lubed up his finger.
"Relax", Dwayne said. "This won't hurt a bit".
"Just get on with it", said Kevin with feeling.
Dwayne pushed against the tight sphincter until it gave way allowing him up Kevin's incredibly hot, tight chute. Kevin's inner-muscles swirled around Dwayne's finger. The sphincter pulsated against the invading digit. In spite of himself, Dwayne sprouted an erection which was most disconcerting. He tried to concentrate on locating his friend's prostate and after a great deal of inner probing finally found a fleshy walnut-sized object. He stroked it with the very tip of his finger.
"Fuck!" exclaimed Kevin as wave after wave of sensuous pleasure engulfed his nether regions, causing his cock to go rock hard.
"I guess that must be it", said Dwayne. I'll just check it for size".
The tip of his finger continued to massage the big man's sex-nut. Kevin had never felt such pleasure and surrendered totally to it, forgetting that the cause was another man's finger up his arse. When that finger was withdrawn without warning, Kevin felt a real sense of loss.
"I'll leave you to get dressed", Dwayne said, going to the bathroom to scrub his hands. Afterwards, he stood in the hallway desperately thinking sad thoughts to make his erection subside. He returned to the bedroom with his dick at half-mast.
"Your turn", said Kevin, who was dressed again and thankful that a loose shirt covered his still swollen manhood.
Dwayne dropped his shorts and undies and got into position on the bed. Kevin greased up a finger and pushed hard against Dwayne's pink puckered hole. Once inside, he experienced the same pleasure that his friend had when examining him. Kevin's erection threatened to burst his zipper.
Try as he might, the big man was unable to locate that prostate so Dwayne offered to change position. He knelt on the bed, offering up his glorious bottom to Kevin.
The sight of Dwayne's perfect fleshy mounds was too much for Kevin. He quietly undid his zipper, liberating his stiff penis. The big man placed some lubrication on his man-pole and pushed the head against Dwayne's inviting sphincter. The hole was actually winking at him, Kevin observed, half-crazed with lust.
"Hey, Kevin!" Dwayne said. "Stop fooling around with your finger".
"It's NOT my finger and I'm not fooling", the big man growled. With that he gave a firm push and his manmeat penetrated Dwayne's tight fundament.
"Owwww!"
Kevin ignored his protests and pushed on until his entire sex-muscle was bloating Dwayne's virgin rectum. Dwayne's cries got more and more urgent but went unheeded. Carnal sensations erupted, giving Kevin a sensual pleasure he had never felt before. Eventually, his big, throbbing organ erupted, coating the walls of Dwayne's rectum with a load of his manly spunk.
Kevin pulled out of his friend. Dwayne wriggled free from under the crushing weight of the big man and rushed out of the room.
Realisation hit Kevin with a wallop and he sank to the floor, aghast at what he had done. He got to his feet and walked to the bathroom. The door was partly open and he could see Dwayne sitting on the toilet, expelling man-seed from his battered behind. He did not see at his friend.
The big man turned and slowly walked back to the living area where he sat at the table, head in his hands. A simple prostate exam had gone horribly wrong. He had raped his flatmate! What sort of monster does a thing like that? Once this got out he'd be ruined for life.
Dwayne came into the room and sat down rather gingerly at the table opposite Kevin.
The big man started to apologise, trying to find the right words.
Dwayne listened, distracted by a realisation of his own. The unexpected fucking had hurt like hell. It had felt like a telegraph pole was being rammed up his bum. But being joined to his best friend in that most intimate and obscene way was at the same time strangely liberating. Besides, Kevin's big dick HAD found his prostate, something his finger had failed to do, and that had changed the sensation from hurting to sheer carnal pleasure.
"Shut up, Kev.", Dwayne said in his deep voice. "You just got a bit carried away, that's all. Really, it wasn't that bad".
Relief flooded the big man's expressive face.
"Want another cold one?" Dwayne asked?
"Yes, please", Kevin croaked.
Dwayne bent over to extract a couple of tinnies from the bottom of the fridge. Kevin saw the swell of Dwayne's ripe young arse through skin-tight jeans and felt his well-used cock slap hard against his belly. Dwayne put the beer on the table in front of his friend. He eyed the big pole tenting the front of Kevin's pants.
"You should be drinking stout. Gotta keep your strength up, Big Boy". He wiggled his delicious arse seductively. Kevin reached out with his big hands and cupped Dwayne's taut, firm mounds...
One thing was for sure, life for those two young medical students was never going to be the same again!
(A fantasy from unclegreg_199 (at) yahoo.com. But life is real so slap on a johnnie, ok?)