“5...4...3...2...1...we have liftoff of the Phallus 5 rocket”

The great pink rocket roared into the air with its two-person crew sitting in their pressure suits in the bulbous purple command module atop the great booster.

This was the maiden trip of the rocket with its crew trained to practice activities that would be required on a future trip to Mars. Things that had never been done in the weightlessness of space before.

The occupants were not known to each other before the flight as the scientists thought that the results of the tests would be easier to assess if starting with a clean slate.

Major Tom was the flight commander and the mission specialist was Captain Sandra.

A few minutes of shaking and rattling and suddenly the engines cut out as the ship entered orbit and the crew experienced weightlessness for the first time.

After a few checks, the crew were given the go-ahead to remove their suits and enter the test chamber by removing the hatch that led into the bulbous head of the rocket. It was a large space, like inside an airliner, with padded walls and grab handles scattered around. Multiple cameras were situated around the space, constantly transmitting to base. Once inside, the command was given to start the experiment.

“Roger that,” said Tom as he started to unbutton the shirt of his flight suit. Sandra did likewise as they both watched each other intently. Once the suits were off, the two crew were floating naked in the module.

A message from ground control, “Please give us your initial observations.”

Tom said, “Looking at Captain Sandra, I can see her breasts are large and don’t sag due to the lack of gravity. In fact, they seem to wobble around as she moves.”

Sandra said, “Tom’s penis is flaccid and floating around freely, pointing in all sorts of directions. His balls are not hanging but moving around by themselves in his sack.”

“Thank you. What are your ALs?”

ALs, or “arousal levels” are a vital part of the experiment: A scale of 1 to 10.

Tom, “AL 5.”

Sandra, “AL 4.”

Ground control, “Please start phase 1.”

The two astronauts are floating around the capsule at opposite ends. Tom grabbed his cock and started to rub slowly, the movement causing his body to spin slowly.

Tom said, “AL7.”

Meanwhile, Sandra watched intently and tweaked her nipples making them harden on her floating breasts. “AL7,” she reported. She was getting very aroused at the thought of ground control watching her from the cameras.

She moved her attention to her hairy pussy. Shaving was not allowed for the experiment as there would be no shaving on the two-year trip to Mars. Her pussy was surrounded by ginger hair while his cock was nestled in a thick black bush.

Tom’s rubbing was getting faster and his spinning got faster too as Sandra opened her wet pussy lips. “AL 8” she reported.

They floated towards each other. He was upside down relative to her and his cock was inches from her face, wrapped in his fast-moving hand. It also meant that momentarily her pussy was near his face. She plunged her fingers into her hole. “AL9,” she reported. “AL9,” reported Tom.

They bumped into each other and bounced apart. This caused Tom to spin even faster, still pumping hard on his cock.

“AL10!” Tom shouted as cum sprayed in an arc from his cock like sparks from a spinning firework. Each spurt of cum produced its own arc which floated off into the capsule and broke into globules which hung around. Sandra took full advantage and tried to catch these globules in her mouth but only partially succeeded causing most of it to stick to her face. It was too much for her. “AL10!” she shouted as the spasms of her orgasm caused her to roll around the capsule space.

“Well done! Great results!” called ground control. “Now move on to phase two.”

It was considered that sexual relief would be required on such a long journey so experimental equipment was installed in the capsule for testing.

Tom floated over to his station. It was a silicon rubber vagina, complete with surrounding hair, built into the wall. Above it were two hand grips and below were two stirrup-like items to keep his feet in place. Tom approached and inserted his feet and gripped the handles, in front of his face, as a small screen showing twenty-four-hour porn. He pressed a button a few times to select his favorite porn, a large woman masturbating. He thrust his hips forward so that his still-hard cock slipped into the device which started vibrating automatically. “AL6,” he reported.

Meanwhile, Sandra went to her station. It was a large vibrator on a tether with various hand and foot hold so that she could choose which position to be in when she inserted the vibrator. It could also be mounted against the wall for hands-free masturbation. She chose the latter. With feet in stirrups and gripping handles, she backed her cunt onto the wall-mounted vibrator. This way she could watch Tom’s butt clenching as he thrust into his rubber cunt.

Tom’s woman on the screen was screaming as she stuffed her cunt with a fat dildo. “AL9,” he reported. Sandra was really feeling the pumping action of the vibrator and used a remote control to speed it up. “AL9,” she reported.

“Cum at will,” reported ground control.

Tom reported, “AL10, CUMMING!” as Sandra watched his buttocks clench hard as his orgasm squeezed cum into the rubber vagina. This was to be collected and recycled into drinking water from the spacecraft.

Sandra cried out, “I’M GONNA CUM! AL10!” With that, the waves of orgasm swept over her and she squirted a little liquid into the environment. Fortunately, all of the electrical systems had been waterproofed for such eventualities.

Both crew were spent but there was no time to waste as space time is limited and expensive.

After a brief rest, ground control ordered, “Good job so far guys but it’s time to move to phase three.” Both reported AL2.

Phase three is fucking.

The two crew pushed themselves towards each other and caught each other in an embrace when they were close enough. Sandra pushed herself down his body, using his semi-hard cock as a lever to help her on her way. She wrapped her lips around his cock. “AL5,” her reported as he hardened. She began bobbing her head up and down his cock but this only succeeded causing him to float away.

She decided to swivel herself around with great difficulty so that they were in a 69 position. That way she could hold onto him around his butt and he could do the same with her. Floating freely around the capsule, she sucked hard on Tom’s cock and used all of her favorite techniques without him floating off. Meanwhile, Tom was holding her pussy lips open while he thrust his tongue into her hole.

“AL8,” they reported in unison. “Proceed to fucking,” came the reply from ground control.

There were several sets of grips and foothold for the crew to use. They chose a bed that had a strap to pass around Sandra’s waist to hold her down whilst Tom had stirrups and grips to aid thrusting.

“AL8,” reported Tom. “AL9,” reported Sandra. Being tied down really turned her on.

Once secured, Tom moved forward and stuffed his fat cock into her gaping, wet cunt.

“AL9,” he reported. This wasn’t going to take long.

As Tom thrust into her, Sandra saw all of the cameras around the capsule and the thought of all of ground control seeing her getting fucked hard was too much.

“AL10! I’M FUCKING CUMMING AGAIN!”

This time a really big squirt escaped her cunt filling the space with droplets of lady-cum. The clenching of her vaginal muscles around his cock sent Tom over the edge and he pumped his third load of cum deep inside Sandra.

“Well done, guys. Mission success. Take some rest now as we have more experiments for you in the morning.”

Tom’s flaccid cock flopped out of Sandra’s cunt followed by a stream of his cum.