Pierre Kohler, author of The Final Mission: Mir, The Human Adventure says:
The issue of sex in space is a serious one,” he says. “The experiments carried out so far relate to missions planned for married couples on the future International Space Station, the successor to Mir. Scientists need to know how far sexual relations are possible without gravity.”
He cites a confidential Nasa report on a space shuttle mission in 1996. A project codenamed STS-XX was to explore sexual positions possible in a weightless atmosphere.
Twenty positions were tested by computer simulation to obtain the best 10, he says. “Two guinea pigs then tested them in real zero-gravity conditions. The results were videotaped but are considered so sensitive that even Nasa was only given a censored version.”
Only four positions were found possible without “mechanical assistance”. The other six needed a special elastic belt and inflatable tunnel, like an open-ended sleeping bag.
Mr Kohler says: “One of the principal findings was that the classic so-called missionary position, which is so easy on earth when gravity pushes one downwards, is simply not possible.”
Gah! So what are the positions? And where can I get one of those “inflatable tunnels”?