Sex in space could be lethal, a study has announced - and not just because doing anything that vigorous in a pressurised tin can 220 miles above Earth is generally a bit risky.
According to a study by biologist Dr Anja Geitmann of Montreal University, there is evidence to show that cells in low gravity have difficulty communicating with each other, and grow at below normal rates.
The fear is that if an astronaut were to become pregnant while in space it could lead to severe health problems for both the mother and baby.
In fact a developing foetus could be at risk of brain disease, cancer and illnesses like Alzheimer's, the study suggests.
In the study, which is published in PLOS One, Geitmann looked at how pollen tubes work in space. When a pollen grain is normally transferred to the stigma it grows into a pollen tube to help more male reproductive cells reach the 'egg'.
In this - and the 'cylindrical tool' involved - Geitmann saw similarities to the way humans reproduce, and by simulating both zero gravity and high gravity in a spinning centrifuge she was able to test how they were affected in different conditions. (This was helped by the fact that pollen tubes grow incredibly quickly - useful when you're renting massive equipment from the European Space Agency.)
She found that the pollen tubes grew smaller in lower gravity, and were wider in hypergravity. Meanwhile intracellular traffic flow, the way that cells communicate, was badly affected.
Since hinderances in this traffic flow can cause many health problems in humans, particularly during pregnancy, Geitmann concluded that sex in space was actually an incredibly risky endeavour.
"Our findings have implications for human health as similar effects are likely to occur in human cells such as neurons where long distance intracellular transport is crucial," Geitmann told the Daily Mail.
Occasionally rumours pop up that astronauts might already have crossed this particular frontier, and Gizmodo points out that Nasa doesn't specifically forbid it.
For its part, the space agency has always denied that sex has taken place in space, however, and it has a strict behaviour code which demands "professional standards" aboard its craft. But if humans are going to form colonies in space or other planets one day, we'll have to come up with a solution - and not just so that some pair of future astronauts can claim bragging rights.
This advert for the voice-control company Voco <a href="http://www.thedailybeast.com/articles/2013/01/10/voco-s-sexist-ad-points-up-that-the-tech-industry-badly-needs-women.html">was widely attacked</a> after it was sent out before CES 2013 in Las Vegas. Jennifer Siebel Newsom and Jean Kilbourne at the Daily Beast said: "The objectification of women and girls in advertising is a serious problem. It encourages men to see women as a collection of body parts rather than whole people."
This advertisement for the voice-control company Voco <a href="http://www.thedailybeast.com/articles/2013/01/10/voco-s-sexist-ad-points-up-that-the-tech-industry-badly-needs-women.html">was widely attacked</a> when it was sent out before CES 2013 in Las Vegas. Jennifer Siebel Newsom and Jean Kilbourne at <a href="http://www.thedailybeast.com/articles/2013/01/10/voco-s-sexist-ad-points-up-that-the-tech-industry-badly-needs-women.html">the Daily Beast said</a>: "The objectification of women and girls in advertising is a serious problem. It encourages men to see women as a collection of body parts rather than whole people."
CES 2013 'Booth Babes'
This notorious picture was taken at CES 2013 <a href="https://twitter.com/Emily?tw_i=289528100293849088&tw_e=screenname&tw_p=tweetembed">by Emily Price</a>. It depicted a company's booth where women were paid to stand mostly naked to attract attention.
Toshiba 'Excite' Ad
This ad for the Toshiba 'Excite' tablet was released in 2012. It was apparently supposed to be funny, but instead angered many in the tech industry.
The original Droid by Verizon was advertised by focusing on its aggressive, "hardcore" technology -- and by comparing it to the "princess" iPhone, illustrated with a handy woman. It was accused of being sexist.
Droid Bionic Ad
To combat that perception, Verizon made an ad for the follow-up Droid Bionic, which was eventually pulled after it was decried as demeaning instead of empowering.
This ad was pulled by Microsoft the day after it was released in Switzerland. A spokesperson said ads there were made with "local interest and local culture in mind".
Dead Island 'Zombie Bait' Game
This special edition video game was announced in 2013 -- and was supposed to come with a dismembered, headless statue of a woman wearing a bikini. After an uproar, publishers Deep Silver swiftly apologized.
Samsung SMART Cameras Launch
Amy Childs launched the new range of Samsung SMART cameras in 2012 by standing under an advertisement that claimed the cameras were "Too Smart For Amy." Needless to say, it wasn't taken particularly well after people pointed out that it might imply women as a whole, rather than this specific woman, were too dumb to use their camera.
Of course, sexism in tech is nothing new -- this ad by Pitney-Bowes from the 1960s asks if it's illegal to kill a woman because she doesn't want to use a new-fangled postage meter. It is.
Compaq iPaq Ad
This French ad for Compaq's iPaq organizer was released in 2001. The copy translates as "iPAQ Pocket PC. All the functions of a PC plus others you'll discover along the way." GraceNet decried it as "flagrantly sexist."
PS Vita Ad
This ad was produced for Sony to promote its dual-sided PS Vita handheld, with the tag line "Touch both sides. Twice the sensations." Sony <a href="http://www.huffingtonpost.co.uk/2012/11/05/playstation-vita-advert-sexist-controversial_n_2075412.html">told HuffPost</a>: "It is part of a catalogue distributed at the Paris Games Week and was therefore intended for gamers at the event."
Web hosts Godaddy <a href="http://breakupwithgodaddy.com/">have been frequently accused of crossing the line between controversial and sexist</a> in their advertising campaigns.
Booth babes at tech trade shows are a frequent sight - though most are just a little less egregious than this CES 2012 picture taken at the Viewtronicx booth.