Sex, the final frontier: NASA acts to ensure that astronauts don’t follow their urges The Independent

In the First World War, frontline troops who were away from their loved ones for long periods famously had bromide put into their tea to reduce the distraction of their sexual drive. But yesterday it was suggested that such measures might be taken a lot further – to Mars, in fact.
Dr Rachel Armstrong, speaking yesterday at a British Interplanetary Society symposium on the Human Future and Space, said the US space agency NASA was considering how to deal with the natural urges of astronauts travelling on long journeys such as a three-year trip to Mars, where the six-strong crew would be likely to include two women.