Mark woke late the next morning. He ate breakfast whilst surfing porn sites then had a shower. He was considering a lazy day lounging around the flat with just his dressing gown on when the buzzer for the door rang.

"Hello."

"I thought I'd return your T-shirt."

"Come on up." Mark pressed the button to open the building's front door and unlatched the door to the flat. When Paul entered the flat, Mark was in the kitchen watching a kettle boil. "Would you like a cup of tea?"

"Thanks."

Whilst they waited in the kitchen for the kettle to boil Mark studied the man he'd given a blow job to the night before in daylight. Paul was slightly taller than Mark, with floppy blonde hair that threatened to fall across his pretty young face. He was slim and stood at ease in the doorway to the kitchen. A lot more ease than Mark felt when he realised his cock was growing hard thinking about what they had done the night before. He worried that the front of his dressing gown would be pushed out by his hard on, giving him away. He turned to the counter to pour the water into the teapot.

Paul sat on the sofa in the living room and Mark took the chair before his computer. He carefully rearranged his dressing gown so as to show nothing off. They sipped tea in silence for a while.

"Last night was fun." Paul managed eventually, "Would you like to.... er do you want to do it again?"

"Yes." Mark worried that he sounded too eager, "All you have to do is ask. You want to....?"

Paul nodded. "But I was wondering. I wanted to ask. Have you ever done anal?"

"No." Mark managed after a moment.

"Giving or receiving?"

"No."

"I'd like you to.... Would you fuck me in the arse?"

"Okay." As Mark recovered his composure he smiled. "We'll need to get some stuff. Lube, condoms, that sort of thing. Let me get dressed and then we'll head into town."

They made small talk on the bus into town, discussing films and television. Mark led the way to a sex shop which catered to most tastes, gay, straight or bi. As they entered the door together they both became nervous. It was going to be so obvious why they were there. They felt as if the eyes of all the small number of shoppers and staff were on them.

Mark picked up a big bottle of anal lube. "You can never have too much." he whispered to Paul.

"I thought you'd never....."

"I've put toys up there." Mark picked up a box of condoms. He turned to a shelf full of butt plugs.

Paul stared at the toys. "You want one?" Mark asked.

"Er...."

"They're good for getting you used to having something up there. It'll relax you."

"Okay." Paul reached out. His hand hovered over the boxes of toys. He tried to remember how big Mark's cock had been, but ended up selecting a butt plug which was smaller. "I'll buy myself this one."

They hardly talked at all on the bus back to the flat. With their purchases in plain plastic bags they stared out of the window and hoped that no-one could guess what they were about to do. Back at the flat they put the bags down on the bed. "Do you want something to eat?" Mark asked.

"No."

"Want to have a shower?"

"Yeah."

They stood for a moment before Mark started undressing. Paul followed suit like it was a race. In under a minute they were both naked, their erections swinging up to stiffness. In unison they each reached for the other's cock and gently teased and stroked it. Before they got too carried away, Mark led the way into the bathroom.

Under the warm water Mark took the lead. He soaped Paul up and smoothed the lather over the young man's smooth skin. He had read that it was key to be relaxed before trying anal sex, and he intended to sooth Paul as much as he possibly could. Standing behind Paul, Mark pressed against his lover. His erection found a natural resting place between taut buttocks, a hint of what was to come.

Mark turned Paul around and dropped to his knees. He took the glistening wet hard on in his mouth and swirled his tongue around the head. Paul reached out to steady himself. Mark smiled around the cock then swallowed as much of it as he could. But, tease that he was, he just as quickly released it. "Ohhhh." Paul moaned.

"You ready?"

"I am so fucking ready."

"Come on then."

They dried off quickly, and Mark grabbed a spare towel on the way to the bedroom. He laid it on the bed, and Paul stretched out on it on his stomach. As Mark moved around arranging paraphernalia Paul watched him, flushing a bright red and biting his lip when the butt plug appeared.

Mark spread Paul's legs and knelt between them. Paul, barely consciously, lifted his arse up to present it better. Mark kneaded the taut buttocks. He popped the top off the tube of lube and, spreading Paul's butt cheeks with his left hand, squeezed out a little of the clear liquid around the rose of his arsehole.

Switching the hand holding the lubricant, Mark smeared his right forefinger with it. He swirled the finger through the lube around Paul's arsehole. Paul was grasping the pillow tightly, waiting, waiting for Mark's finger to enter him. Mark eased it in gently and smoothly, up to the second knuckle. He held it there for a moment, then started slowly pumping it in and out, slightly deeper each time.

Paul tilted his arse up further, lifting his cock so it only touched the towel with its tip. Mark put the tube down and played with Paul's balls for a moment. Paul made an annoyed noise when Mark pulled his finger out, then sighed as Mark snatched up the lube and spread more of it around. This time Mark squeezed two fingers into Paul, pumping them and probing for the prostate with them.

Mark reached for the butt plug, then juggled it, the lube and the fingers in Paul's arse. He wiped lube off his right hand after the plug slipped from his grip and tried again. Paul looked around, guessing what came next. After coating the butt plug with lube Mark pushed it in. Paul relaxed, as best he could, and soon the flared head popped past the ring of his sphincter. Paul loved the feeling of being filled, squirming and pumping his arse just to feel the plug move inside him.

Mark sat back and enjoyed the view. He wanted to give Paul time to get used to the butt plug, and to relax ready for a cock. He moved up the bed and presented his hard on to Paul, who grinned and reached out for it and started nuzzling around the balls. Mark let Paul lick his shaft and balls until his erection became even larger and harder. Much as he loved the attention he knew he didn't want to come from a blow job when there was a virgin arse awaiting him. He moved back down the bed and put a condom on.

With his sheathed cock lubed up and ready, Mark reached for the butt plug and started pulling it out. Paul made a little "Oh!" as the plug popped out. Mark dropped the plug to one side and quickly angled his cock to Paul's dilated sphincter. He pushed it into place with his hand, until the head lodged inside the muscle ring, then put his weight behind it.

Paul raised his arse to meet Mark's erection. They squeezed together slowly until Mark was completely buried in Paul's arse. He stretched out against the younger man's smooth skin and enjoyed the tight, warm squeezing of his cock. "Wow." said Paul beneath him.

"Wow," Mark echoed.

Paul turned his head, and Mark reached down and they kissed. For a moment that felt odder than Mark's cock head deep in Paul's arse. "Ready?" Mark asked.

"Fuck me." Paul requested.

Mark pulled out then, gently, pushed back in. Paul sighed under him and cocked his arse up further. With each of Mark's thrusts Paul lifted himself higher off the bed. After a while they had to stop so Mark could adjust his position for better penetration. He reached around to hold Paul's hard on.

It took a few thrusts to get it right, but Mark was soon stroking it in rhythm with his movements. As he moved harder and faster, however, he lost the beat again. Grasping Paul's waist for stability, Mark began pounding Paul's arse harder and faster. Paul reached back and started masturbating himself.

With a rising crescendo of grunts and moans they headed rapidly to climax. With a final push as deep as he could go Mark filled the condom in Paul's arse. A few strokes later Paul himself came, squirting all over the towel.

Mark let Paul sink to the bed, slowly pulling his cock from the younger man's arse as he did. Paul let out a little moan as the cock head finally popped out past his sphincter. They laid side by side, for a while only able to say "Wow."

"Another shower?" Mark suggested after a while.

"Yeah. I think so." Before they got up Paul asked, "Do you want to try that? It's incredible."

"Hell yes."

Under the warm water of the shower they were soon reinvigorated. Rather than going down on Mark, however, Paul turned him around and, sinking to his knees, started licking around the rim of his anus. Mark squirmed, turned on by the new sensation.

The towel was still damp, so they just brushed off the heaviest of the water on their bodies. Mark led Paul back into the bedroom and signalled for him to lie on the bed. Paul grasped his hard on and held it upright. On hands and knees Mark licked it up and down. He shuffled around until his arse was over Paul's face. When Mark passed the lube back Paul understood and lubricated a finger which he slowly pushed up Mark's arse.

Mark had played with butt plugs before. He had trained himself to relax his sphincter to take in ever larger objects. He stopped licking Paul's cock as two and then three fingers were thrust into him, so he could enjoy the sensations.

Grabbing the condoms, Mark unfoiled one and rolled it down Paul's hard on. Paul passed the lubricant to him and Mark smeared it all over the condom. Then he moved around so that his cock laid on Paul's chest as he reached back for the younger man's hard on.

With great care, and a little guidance from Paul, Mark brought the hard on to his arse. Certain it was lodged firmly, he relaxed and began sinking back onto it. The head pushed slowly past his sphincter, causing them both to cry out when it passed the barrier.

This was different to playing with a butt plug, Mark realised. There was a warm body under him, straining to thrust into him at its own pace. He sank farther down Paul's cock until it was as deep in him as it could go. Then he started moving up and down in short movements. Paul started thrusting and pulling out under him, matching his rhythm. Then he grasped Mark's hard on and let it slide through his hand as they moved.

They were both too excited for it to last as long this time. Under Paul's ministrations Mark soon came, splattering semen across his lover's hairless chest. He began rocking back and forth harder and faster, willing Paul to come in him. Their bodies slapped together and slid apart faster and faster until Paul thrust up and held his position as he came.

They sank slowly back to the bed. Mark moved slowly forward, until Paul popped out of him with a jerk that made him moan. Then he dropped sideways and stretched out on the bed. He drifted off for a while.

When Mark woke again Paul was stood at the end of the bed, towelling himself off. "Another shower." he said with a smile. "I, er, thought I should head home. I wasn't going to wake you. Thought I'd leave a note."

"No worries." Mark watched Paul dress. "We should do that again some time." he suggested when Paul was fully clothed.

"Maybe." Paul offered. "I'll let myself out. See you some time next week."