Karl was gay. He knew it since he first began to jack off. Actually, he kind of knew it before then. The sight of a man or boy near naked always made him stare. "It's just a phase" his Mother had told him once. But the phase didn't go away. In camp, he gleefully showered naked with the other boys, went skinny dipping and watched thru a screen, teenage boys masturbate with each other. "Someday we can do that" he said to his camp friend. And he felt the friends hand on his butt playing with it. Karl had a nice butt..round and firm. "Hey, Bubblebutt" one of the older kids called to him during one summer. That's when Karl began to know he had an attribute that other boys seemed to like. Standing naked in front of his mirror, Karl would play, pet, pinch, finger, jack, curl in a ball trying to lick himself and generally get so excited all he could think about was exploding all over the place..which he did. As he grew older, the guys had sleepover parties complete with late night horror films, jokes, stolen beer and some pot now and then. Along with the others he lounged around in his underwear and told jokes, lied about sex, argued about sports, complained about parents, cursed teachers and discussed the meaning of life. In the darkness, he heard moaning and rustling. Sometimes the shadows showed him other boys jacking off and sometimes jacking off each other. His own hands explored and satisified a few of his buddies now and then. And he felt his first blowjob during one of those all nighters. Christmas came and he got he usual things. But from an Uncle who he especially liked, he got some very expensive underwear. "The only requirement is you have to show them off to me before anyone else" Karl stood in front of his favorite jackoff mirror. The Calvin Klein underwear fit him tight...almost as if he hadn't anything on at all. His cock responded and pushed his basket our further then normal. Uncle Jon came in and seemed delighted at the site. Karl stood still while his Uncle ran his hand all over the cloth covered buttocks that had gotten him the nickname of "bubblebutt" among some of his peers. "Nice...I knew they'd be right for you. Bend over a bit" Uncle Jon's hands went under Karl and encircled his balls which hung there...supported by the cloth. "Nice there too..I knew you would look great in these...I'll get you some more..that's all you should wear from now on" Uncle Jon moved his hands inside the underwear and began to massage Karl's cock. Karl stood up and let himself be pulled back against the man...as he felt the large strong hand bring him to the point of orgasm. He was groaning and writhing. Uncle Jon's other hand began to pinch and play with Karl's nipples....making the boy even writhe more. When he exploded the sperm soaked his new underwear...making a huge wet spot on his new white tight shorts. "There, expect more of that when you wear those things..maybe something else too" Uncle Jon was massaging Karl's butt now. "Thanks" Karl said to his Uncle not only for the underwear but for one of the most fantasic sexual explosions he had experienced to date. The box was on his bed when he got home. It was from Uncle Jon. He knew what was in it. His mother asked and he said the truth, more underwear. "You'll have to model them for me" she said. Karl had no plans to do so at least not for his mother. But that weekend he stripped down to a pair at one of his buddies sleepovers. And as Uncle Jon promised, he got lots of attention. "Wow those look great on you" "Hey bubbles, where did you get those?" "I never knew you had so much meat packed in there" His cock stirred in response and he let it..not caring who knew he had erections among that group. Someone had gotten a porn tape and the group watched making rude comments at first then grew silent as each boy fantasized about something privately as they continued to watch. Cocks came out of shorts and boys slowly jacked them in plain view of the others. A girl was sucking a guy on the tape. "Wish I could get some of that" one of the boys said. Another voice responded "you can" and everyone laughed. The guy on the tape was soon buttfucking the girls. "Wish I could get my dick into a butt like that" one of the boys said. "Ask bubbles over there, maybe you can" again the boys laughed. Karl was getting so turned on he would have had sex with any of the boys even with the lights on. He didn't have long to wait. The lights slowly were dimmed then turned off. Only the glow of the tv screen illuminated the boys who were laying around. More then one had taken off his underwear and lay there buck naked now stroking. Karl saw one or two guys stroking each other. It was going to be a hot night, he knew. "Bubbles get us some beer" someone said and Karl moved without questioning the request, walking in front of the TV screen toward the bar. Nobody complained when he did that either....they gladly watched his Calvin Klein clad butt and basket instead of the man and woman on the videotape. When Karl returned the TV was off. A red light was on in the corner...allowing only silhouettes to be seen here and there. "I put the beer on the table" he said but nobody responded. He moved to where he had been sitting and sat on the floor. The hands that began to pet his bare legs indicated to Karl that while he was out of the room, the others had decided what to do next. There were hands all over him, feeling his butt, basket, nipples and smooth chest. He reached out to respond and found naked bodies around him..he touched, felt, pet and stroked cocks, balls, and ass cheeks. His underwear was pulled down part way as fingers and lips attacked his buttocks. Hands slid inside his underwear to find his cock and balls and return some of the attention he had been giving others. His legs were lifted and he felt his first fuck.....it hurt like hell, but he endured it quietly....and eventually felt so turned on by the fucking he shot sperm all over himself and whoever else was playing nearby. It didnt' stop then. He was on his hands and knees sucking a dick and felt hands , fingers and another cock invade him..he took it withouth any pain this time and moved his own hips riding the cock. Youth and lust combined that night as his mouth and butt experienced many of the other boys there. He tried to keep count..but realized he couldn't..besides in the dark, he didn't know which were new ones and which were guys coming back for more. Karl felt another boy on his hands and knees and was soon pushing his own cock into the bared buttocks there. Someone tried to fuck him as he fucked the other boy.....it worked for awhile...but eventualy Karl was slamming into the butt so wildly the other boy couldn't keep up. "So how was your party the other night" Uncle Jon asked. Karl had been mowing his Uncle's lawn and stopped to drink the lemonade the man offered. His bare chest was sweaty and had grass clippings adhering to him. "Great....just as you said it would be" Karl blushed at his admission but he knew Uncle Jon would keep his secret. "Let's get you cleaned up" Karl watched the hairy man standing in the shower with him. He soaped and was soaped. He enjoyed the mans hands all over him..and loved feeling the curly chest hair the man had. "Why don't you stay for dinner and for the night too? I'll call your mom" Karl agreed and was soon sitting on the floor next to his Uncle. Both men wore only their underwear. Uncle Jon wore similar ones to those he had given Karl. "I think you should come over more often...I have lots of things you can do around hte house" Karl nestled in his Uncles arms...feeling the mans hair body against his back. He had orgasmed twice that evening as his Uncle manipulated and then fucked him in the bed they shared. His new underwear lay on the floor.. in the moonlit room. They somehow glowed...as if telling Karl this was only the beginning. Karl wore them all the time when at his Uncle's house...in fact wore nothing but them..even when he was outdoors working in the yard. "We'll have to get you some in blue and black so they look like shorts outside" Karl would wear them, even the white ones and didn't care who saw him that way. Sleepovers continued as did his exploration of sex with the other boys. His nick name had been shortened to Bubb at school..and many knew what it meant. Many did not. Everyone in his gym class knew of course..because the thing he wore there was a jockstrap which showed off his bubble butt. He planned to show his Uncle sometime what he looked like that way too. But for now, he continued to wear the sexy, form fitting Calvin Klein underwear that had changed his life...or at least improved it.