Tom handed Mark a beer, before sitting down next to him on the couch. They'd been knocking back beers all night, which inevitably turned to talking about girls, which inevitably turned into getting horny, which inevitably turned into watching porn together. It was the same every time. It would start with normal conversation, and end with them jerking off next to each other. They'd been doing it since they were teenagers, so they had no shame anymore.
Scrolling through the pages, they found a video that had a really hot girl in the thumbnail, and started watching, It started out interesting enough, with a little bit of foreplay, and a nice looking blowjob. Within minutes, both men had their pants off and were lightly rubbing their own cocks through their boxer shorts.
Tom couldn't help but notice as Mark's cock began to grow, pitching a tent in his underwear. He was slightly bigger than Tom's own, but not by much. Shaking it off, he turned his attention back to the screen. The girl was now making full use of her lips, gliding them up and down in a monotonous fashion, and was now tickling the underside of his balls.
Wait. Was she? Tom looked closer. No, he realised. She's tickling his backdoor. He glanced over at Mark and saw that he too had noticed, but didn't seem surprised. He caught Tom looking at him though, and raised an eyebrow.
"What? You never done that?" he slurred out.
Surprised, Tom shook his head. "Fuck no"
Mark shook his head in disbelief. "Fucken hell mate, you're missing out. I had a chick do it to me once, and I nearly cried I came so hard. Do it."
Tom was stunned, but he was drunk as well, so he just snuffed a laugh. "What, now? Get fucked."
"Why not?" Shot back Mark. "You had your dick in your hand 30 seconds ago, it's not like we're a pair of prudes. Just stick something up there and jerk off, you'll love it"
"Like what, it's not exactly like I've got arse dildos lying around"
Mark rolled his eyes. "It doesn't matter ya dickhead. Big enough to feel it, small enough so it don't hurt. Just fucken pick something, and stick it up your arse."
Tom could not believe the conversation they were having, and they'd had some truly bizarre ones in the past. Finding it a mix between confusion, curiosity, and hilarity, he blurted out "Fine then cunt, I pick your finger" as a joke, but Mark's response was not what he expected.
Raising an eyebrow at Tom, he was silent for a moment, then replied. "Fine, ya wuss. I'll bite the bullet just to show you. Just...don't jerk off while I'm doing it, I don't want that in my face. I'll do it for a little bit, you'll see it's not that bad, then you can do it yourself." And with that he got off the couch and dropped to his knees between Tom's legs, surprising him so much he could barely respond.
"Y...you're serious? I...I was just kidding." Despite his verbal protestations, his body did the exact opposite, his hips lifting of their own accord as Mark grabbed the waistband of his underwear and slid them down, exposing Tom's manhood. The angel on his shoulder was asking him why he was going along with this, but the devil on the other side was telling him to let it happen.
The devil won.
Mark spat in his hand and rubbed it all over his finger, coating it with the slippery saliva, then without any hesitation, reached under Tom and probed his backdoor. "Just whatever you do, don't tense. Just relax your muscles and it won't really hurt."
Tom managed to actually will his body into calming down, and a second later, he felt the pressure of Mark's finger push inside him, causing his hip to lift up and a deep gasp to erupt from his throat. A second later, his body accepted it, and relaxed into the seating position again.
While he was initially nervous, he suddenly realised that he was the one in power here. He had told Mark to finger him, and while there was no humiliation on Mark's part to start off with, Tom could see a bit of it creeping onto his face, clearly not enjoying having to finger his mate's arse. Something about this power balance turned Tom on, and he began to watch Mark, who had his eyes low toward the ground.
The finger inside him was worming itself around, and while Tom could agree that it "wasn't that bad", there was certainly nothing good about it. It just felt weird.
Wait.
There was something he felt for a split second, it - there it was again. What was that? He was about to say something when it happened again. This time he gasped without meaning. What was going on?
He suddenly realised this was going for longer than he thought. He was expecting maybe 30 seconds, tops. Mark had been fingering him for at least 3 minutes now. It happened again, a loud gasp this time. Did this feel good? He wasn't sure. It was so sporadic he couldn't focus on it. As if Mark read his mind, it happened again, for several seconds this time, as if Mark was pressing a magic button again and again.
His back arched and his eyes rolled, another gasp, followed by a long sigh of pleasure. Mark looked up to see Tom's fattening cock and smirked. He'd found the spot.