Astronauts aboard the International Space Station (ISS) often engage in activities similar to those on Earth, leading to questions about sexual behavior in zero-gravity. NASA has no formal policies on personal activities, though commanders have disallowed sexual intercourse. Researchers Dr. Esme Louise James and Dr. Matt Agnew investigated the dynamics of ejaculation in space, revealing that it would propel the astronaut backwards at about two meters per hour. This poses significant challenges for human intimacy during space missions, particularly for future Mars expeditions.
NASA has not issued any strict guidelines around 'alone time', although commanders have stated that they do not allow sexual intercourse on the ISS.
According to the pair's calculations, ejaculation would propel the astronaut backwards at a speed of around two metres/hour.
Sex in space is physically possible, but would not be as easy as it is here on Earth.
Dr James and Dr Agnew posted a video on TikTok, exploring what would happen if a male astronaut ejaculated in space.
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