Sex in space is going to be way different than it is on Earth
NASA and the Russian Federal Space Agency have consistently and aggressively denied that any astronaut has had sex in space on the International Space Station (ISS).
So it seems that no one, yet, is part of the "250-mile-high club."
PornHub, the internet's largest pornography website, wants to change that.
PornHub made headlines last week when it announced its plans to be the first company to shoot a sex tape in space. It even launched an Indiegogo campaign to raise the $3.4 million it estimates the film will cost to produce.
The company wants to film its stars having sex during the few minutes that the spaceship will be in zero gravity as it reaches its maximum height over Earth. (No word yet on what spaceship they'll be using for the film yet).
There's one glaring problem here: We know almost nothing about the science of sex in space and the potential risks and problems that could arise.
There are some biologists, astronomers, and anthropologists who have spent time speculating about what sex in space will be like. We can't be 100% sure of anything since we have little research and zero data, but it's clear sex in space won't be anything like sex on Earth.
The zero gravity problem
It's not something most of us spend any time thinking about, but gravity is pretty critical for sex.
Getting it on in a zero g environment might sound kind of hot (PornHub certainly seems to think so), but most experts who have spent time thinking through the logistics have a different opinion.
"One of the things that gravity helps us do is stay together, so sex in microgravity might actually be more difficult because you're going to have to make sure that you're always holding each other so you don't drift apart," Paul Wolpe, a senior bioethicist at NASA, told VICE. "It might be a lot more challenging and a lot less fulfilling than most people think."
"But there'd also be ways in which Newton's third law - of action and reaction - interfere with the normal methods of sex that you might use on Earth," Impey said during an .
Then we have to consider how zero gravity affects the actual human body, not just its motion.
The human body - blood vessels, muscles, everything - is designed to deal with the pull of gravity. Blood doesn't flow through the body very well in zero-g. That means men could have a difficult time getting and keeping an erection.
Another natural turn off is that people sweat way more in space. It builds up in layers and clings to the body because there's no gravity to make it drip off. That could make intimacy a lot less pleasant, Impey points out.
If we work out all the logistics here, there are still more questions to answer. There's a fantastic Reddit discussion about the intricacies of sex in space, and Reddit user myprocessor posed an interesting question:
"I can't imagine going through pregnancy in zero gravity. I also wonder how this would effect the development."
The bottom line is that we have no idea. Some studies on mice suggest that radiation (in addition to lowering a male's sperm count) could create pregnancy complications and even birth defects.
There have only been a handful of these kinds of studies though. Clearly we need a lot more research.
Psychological complications
When a small group of people are confined to a small space for months, as they would be on a journey to Mars or beyond, it's hard to keep the peace. If two of those people were having sex, there's no telling how it might affect the group dynamic.
"Now that brings other problems: not all relationships last," astronaut Ron Garan told VICE. "Imagine a breakup on a three-year mission to Mars."
NASA has a strict policy that no couples can be on board the ISS at the same time. (Even though it happened by mistake one time).
Sex on Mars
Gravity on Mars is about 40% of Earth's, so sex on Mars will be less complicated than sex in zero g.
Physically having sex may be easier but there are other complications with intimacy and procreation on an alien world. Impey has a great summary of the some of the biggest problems in his book "Beyond: Our Future in Space:"
We'd also need to have a huge number of colonizers to ensure there's a healthy amount of genetic variability. If Elon Musk gets his way then we'll have a million people on Mars, which should do the trick.
So how do we move forward? NASA seems a little prudish about the subject - it's published very little information about sex in space and most of its communication effort on the topic has gone toward squashing all rumors that any astronauts have done it.
In some ways that makes sense - there are still tons of other, more pressing health issues we need to figure out about living in space. So sex research is not a priority for any space agency right now. But it's a subject that needs a lot more attention and open conversation.
"I'd just assume [sex in space] is going to be an adventure, and people will be creative and they'll find new ways to enjoy themselves," Impey said.