Following a certain incident, that led to the infamous Dr. Robotnik becoming...permanently disabled, our blue hero found himself with a remarkable amount of new free time on his hands. And he used it reasonably well. He spent more time with his friends, both those he gained before, and during his adventures. He even managed to reconcile with Amy Rose, and they weren't really dating, but their friendship began to actually develop. In fact, his relationships with rivals like Shadow and Knuckles managed to mature, and develop. Especially with Shadow, though that was thanks mostly to therapy on his end. 

Time passed on, and with the world's dwindling need for a super-fast hedgehog, Sonic's name slightly faded from the cultural mindset. He didn't really mind. Being the center of attention wasn't really his thing, though he could hold a crowd's interest. He could just relax, explore the land, and whatever he found. And eventually, he discovered something that took hold of him, and wouldn't let go: his sexuality .

Well, with so much more free time on his hands, Sonic had a bit of difficulty finding what to do with it. For a while, he took to his normal hobbies: running, scaling buildings, and maybe racing. Eventually, he moved in with his best buddy, Tails, for a nice place to crash. Life was simpler, but not bad. 

Then, one evening, when he was running around on the city rooftops, enjoying the cool air, he noticed something. He had happened upon Rouge the Bat's penthouse apartment, with the window shades open. And in there, was the familar Bat, and two... maybe three other men? They were all naked, and seemed to be enjoying each other's company. It took Sonic completely by surprise, and stirred up a lot of new feelings in the hedgehog. Unsure whether or not she noticed, he retreated back home, but the image wouldn't leave. 

It wasn't...bad, that image, it just was interesting. It stuck with him for quite a while, and sometimes, he searched on the computer for what the term might be for it. Eventually, while he was on it, he noticed some sites in the history that Tails must have been looking in. 

"...Woah...Shaped just like my dick...They sell those things?" 

From there, it was practically the wild west. Image surfs, going through porn sites, and almost downloading a movie, or two. He stopped clearing his history on the browser, and more than likely, Tails noticed. Though, instead of directly confronting him about this, he simply got another computer. 

"Now you have yours, and I have mine, and we can both use ours, whenever we need to!" 

Of course, this opened the door for Sonic to further explore the world of porn. Striptease, roleplay, camwhores, all different kinds of species, human or mobian. He even found interest in some males, if they were cute, and girly enough. He began to download movies, order lingerie & cosmetics, and considered displaying himself online, as well! Also, after enviously watching wenches suck cock for so long, he realized he could emulate, with all of his experience curling into a ball. 

He figured Tails was getting into similar, if not the same interests. But, he never really talked about it with him. At least, that was until Tails's 18th birthday, and as his wish, the two went to a strip club. It was amazing, there. Those girls, and guys, dancing for the hooting and hollering crowd; the sexy outfits they wore, some with themes, like nurses & cheerleaders; and those moves... Sonic, at this point, had gotten used to not being in semi-obscurity, but this... this was something he could get into! 

And so, about a month later, he signed up with a club, to learn the moves of an exotic dancer. And though he didn't share what he was going out for, with Tails, the two found themselves to be a bit more comfortable, talking about sex. At least, on a restrained level, anyway. Still, there was a tension between them, of something they wanted to talk about, but didn't. This finally came to a head, when the two decided to play a game of chicken. 

"We sit together, and both watch a softcore porn video. No taking eyes off the screen, and the first one to break, or leave, loses!" 

And so the erotic program started, and finished, and both of them were still on the couch. They weren't sure what to make of it. A draw? Incomplete? Was it even that sexy? The two decided to call it unfinished, and tried a hardcore video video the same week. Still, the same result. Weeks passed, and they went through videos, and entire movies. To the point that it became less of a competitive game, and more, something the two did for fun. As the weeks went by, their modesty with each other slowly dropped, around this. The two wore less constrictive clothes, sat closer together, and decided to just cover their loins with blankets. Eventually, the two just showed each other, what they had, and could then sit together, enjoy the show, and relax. They could even chat together, about it. 

"Ah, it's so much hotter when she's got a naughty outfit on, underneath. Rather than her just being naked." 
"Yeah, except for when they just up and tear them off, like they're flashers. Heh." 

"Mmm... Which do you prefer, Tails? Humans, or mobians?" 
"Eh, hard to say. Guess it's more what I'm in the mood for." 

"PFFF-HAHAHAhaha... HOo, that line read..." 
"Yeah, that's... How people talk. That acting class was well worth the money." 

"Damn...He's actually pretty cute...and that bubble butt..." 
"Oh, please let someone spank that jiggly ass...Nice~" 

Then, one session, Sonic must have been a little careless with the words he let slip out, that it got Tails's attention. He was lusting after one of the actors, or actresses, and the way they were sucking a dick. Then the craziest thing he heard Tails ever say, hit him. 

"Hey Sonic... you think I could do that for you?" 

Instantly, images of his best friend sucking him off like a blowjob queen filled his head, and emptied his balls. The idea was so hot...but no! They couldn't do this! They were best friends! He had to get away from this. The shower! 

"Uh, maybe another time... I mean, I guess. But, well... I think this might be it for me, tonight. I'mma go shower off." 
"But you normally cum two more times than this! What's the matter?" 
"Well, I guess it was just that really cute boy, in the purple. He got me going harder than usual." 
"Or, was it just because he wasn't me? Sonic?" 
"Can't hear you! turning on the water!" 

The droplets tapped on his head impatiently for minutes, but each one felt minutes in-between, as he thought. They'd always been best friends, and Tails had always looked up to him! He'd been his little buddy, like a lil' bro! Could he actually do that to him? I mean, he'd always been cute. Kinda like some of those boys in the pornos, but... How serious was Tails about this? How serious could they get? Would they...? No. No, Tails wasn't a naive kid anymore. He'd know what he'd want. If this was just physical, it was just physical. He decided to consent, that night. See how far he'd go. 

And so, Sonic left the shower with nothing but a towel & a half-mast length, and went to the fox's room. He wasn't there. He wasn't in the living room, nor anywhere outside. Instead, he was in Sonic's room, dressed like that cute boy in purple. And from the way he stuck his ass out, it was clear what he wanted. 

"Tails... I...I'm sorry. I shouldn't have been so..." 
"...So...what, Sonic...?" 
"...Ah, I'm not even sure what the term is...Just too horny, I guess..." 
"And...?" 
"...Come here, cutie~" 

He opened himself up, and the fox scurried to him. His eyes were lusty, but full of that kind light, too. Almost instantly, he went to work, and boy was THAT something! 

"Ahhh...F-fuck...Tails...It feels so weird, from another's touch...it's awesome...!" 
"...And yours...tastes like a whole different flavor to mine. I love it~" 

It wasn't long before he came. But, they had yet to climax. 

"Tails... please... Get on the bed...I need to fill that cute, tight butt of yours..." 
"Oh my fucking god, YES...~" 

Sonic took him, and filled both ends with his seed. The two climaxed together. Became one with each other. And yet, when both had caught their breath, and looked into each other's eyes. They simply saw... 

"My best friend." 

The two slept together, would watch porn together, and kiss & fuck together. But their emotional relationship remained the same as it always was, regardless of their new physical one. Best friends, roommates, and fuck buddies forever.