Amongst the problems with sex in free-fall is finding something to push against. People have thought up some incredible positions, and developed the stirrups for zero gravity play rooms such as the one we call the Heart. They're high impact plastic tubing with straps for footholds fastened to them. I pushed off the wall gently and took a stirrup to the centre of the Heart, where the bots waited. My little blue ovoid personal assistant flipped a piece of its carapace up to hook through a hole in the stirrup.

The others drifted over, bringing more stirrups and toys with them. Marc was the last to kick off from the wall. He had to put the panel back over the entry hatch and stick the “butt plug” in the vacuum hole. The Heart is cleaned with an airlock system, sucking all the fluids and other stuff through a small pipe. There are safety features galore, but the plug is one last way to be sure. I watched my buddy for the next month as he sailed over. He was short but heavily muscled. We were all more toned than when we'd set off for Mars. Electro stimulators had been exercising our muscles all the way out, whilst we hyper-slept and had our training pumped straight into our brains. He spread his arms and legs to give us a full frontal view. His penis, already half erect, is shorter than mine, and not as thick, but attractively formed just like he is.

The others reached the group of bots and I enjoyed the feeling of all that naked flesh sliding past me. There were six of us in the shift team- me, Marc, Yuki, Shanna, Kyle and Olaf- in three buddy pairs. Each buddy team was together for thirty days at a time. There were two other shift teams, and we would swap between them as well. By the end of my tour on the Mars station I'd have buddied with all seventeen others- nine men, nine women. The buddy system had evolved over the years, from simply a way to stay safe in space to a means to bring a crew together in ways more innocent bonding methods simply couldn't. They'd had to recruit for more open minded astronauts, but that had actually increased applications. Nowadays crews didn't meet until they were in orbit over Earth, about to board the seventeen month flight to Mars. And they slept for the whole of that. We had arrived less than twelve hours ago, eager and horny, and the station's computers had made the first buddy selections. For the next shift period I would work, eat, sleep and play with Marc. Occasionally one or more of the shift crew would join us, as they all were for this first session to celebrate our arrival over Mars.

We clipped toys to our bots and they sailed away on puffs of compressed gas, ready to be called later. I grabbed the nearest handhold on Olaf, his huge erection. He grinned at me, caught Yuki's ankle and started climbing up her leg. I felt a collision with my midriff, hands wrapped around my waist and a tongue swirled around the tip of my penis. Marc had got straight to the point. I pulled myself closer to Olaf's dick and ran a tongue along the underside. Yuki had hooked her legs under his armpits and clamped her pussy to his face. All of five foot two, she was juggling six foot plus Kyle like a balloon, flicking her tongue over his hard on every time he drifted past. At the other end of our chain Yanna was kissing up the inside of Marc's thighs.

Yuki stopped teasing Kyle, grabbed his buttocks and pulled him toward her. Now we began the shifts and realignments that allowed us to form a ring, docking Shanna and Kyle. I took Olaf's dick into my mouth, savouring the flavour. Holding the base with one hand I moved around it. Marc hooked my legs over his shoulders and started rimming me, moving Shanna closer still to Kyle. Dark thighs closed over his blonde head and his tongue delved into her pussy.

The ring of bodies writhed as we used our mouths on each other. We hit the wall gently and rolled along it. First to come would break the circle. I was determined it wouldn't be me, despite the feel of cold lubricant and probing fingers in my arse as Marc prepared me.

With a cry and a shudder that transmitted around the ring Yuki came. She let go of Kyle and the ring broke. I didn't want to relinquish Olaf's big dick, but he was twirling Yuki around to impale her on it. With one last kiss of the tip I pushed away. Even dazed from orgasm Yuki managed to reach down and guide Olaf into her. She pulled her legs up to her chest, incredibly supple, and he started twirling her around his hard on like he was screwing a bolt into her. She started moaning with a second orgasm almost immediately.

Marc had two fingers up my arse, pushing away in a gentle rhythm whilst he held my erection and licked my perineum and balls. I was tempted to let him carry on until I came, but that seemed selfish. I signalled my bot over and unhooked the stirrup. Because he was shorter I twisted two of the foot loops around to be on the other side of the bar from the rest. This would bring him up to my height and let him thrust his full length into me. Even this simple job was hard because of the pleasure his fingers and tongue were giving me. I reached down, took the hand from my cock and passed the stirrup to him.

Marc understood immediately. He hooked the fingers in my back passage, pushing hard on my prostate and making me gasp, and used them as his hold as he moved around. He hooked my feet into the stirrup then started moving up my body. His free hand grabbed at my shoulder as he lined himself up. His fingers didn't pull out until he was ready to press home his erection. It slid easily into me, lubricated as I was. He kissed the back of my neck as he began gently thrusting.

We were rotating gently across the Heart toward Shanna and Kyle, who were forming a cross as they both held their stirrup and pushed back and forth on it. They spotted us coming toward them and started plotting ways to dock with us. My hard on was the biggest it's ever been. It felt like it was straining to pull away from me toward the naked bodies ahead. They let their stirrup go and strained to catch ours as we passed them.

Shanna and Kyle scissored together around us. He came up on my side, taking the head of my penis into his mouth. Shanna wrapped her arms around Marc and my waists and started rimming Marc. With her legs wrapped around Kyle she managed to keep him in her through this manoeuvre. Marc started moving in time to the tongue licking his arsehole, Kyle sucked up and down my hard on in the same rhythm.

Marc released my shoulders, staying connected to me where he was firmly wedged in my arse. I looked up to see Yuki and Olaf heading towards us. Her legs were spread wide as she aimed to land her pussy squarely on his tongue. Olaf held her, helping her aim, his dick coming back to my mouth. I caught him and swallowed his massive hard on, taking it deeper than I ever had before.

I was in ecstasy. A dick in my mouth and arse and a warm mouth around my own hard on. It wouldn't be long until I came. Marc beat me to it, pumping warm liquid deep into me. This set me off and I came in Kyle's mouth. He tried to swallow it all, but some still escaped. I reached up and started moving Olaf back and forth, making him fuck my mouth. He came all over my tongue, flooding my mouth with salty liquid. Shanna was coming, I could feel the vibrations transmitted through Kyle. Yuki was crying out in ecstasy as Marc worked his tongue in her.

We drifted apart, sated for the moment. Marc was still hard in me, but Yuki wanted his dick in her arse and mine in her pussy, or so she told us as she drifted over. Olaf, Kyle and Shanna liked that idea, and they moved together to do the same. We had hours before our rest period, and there would be plenty more combinations to try out as we got to know each other intimately.