Sex in space is possible but is unlikely to be enjoyable.
Astronauts could have sex in space
Experts say that spacemen and spacewomen could make love in orbit should they wish but are likely to face plenty of logistical issues when doing so such as gyrating their bodies without gravity and bodily fluids floating around the spacecraft.
Physicist and astronomer Jon Mills said that sex in space would be comparable to trying to have intercourse while "skydiving".
He said: "The issues surrounding the act all revolve around the freefall, micro-gravity, environment experienced by astronauts.
"Imagine engaging in sexual activity while skydiving - every push or thrust will propel you in opposite directions."
Former NASA Bioethicist Paul Root Wolpe explained that frisky astronauts would have to be "creative" with their space lovemaking.
He said: "Everything on the walls of the space station is covered in Velcro, so you could take advantage of that by velcroing one partner to the wall.
"We don't realise how much gravity assists us in the act of intercourse. Sex involves pressure. In space, without any counterforce, you end up constantly pushing your partner away from you."