Last time I was in a topic like this on HN, there was a discussion about whether a mission could have as its mission parameters a part where they just send people willing to entirely abstain from sexual relationships - whether this could possibly be a pragmatic thing for early exploration-oriented pioneering missions where people are likely to die on Mars anyway.
Or rather, it started pragmatic, but it turned into a bit of a culture-wars clash immediately (apparently some people feel quite strongly about humans abstaining from sex), and honestly, if any US or European space program did the same, they'd have to deal with the fallout, so... it may not be the best plan.
Or rather, it started pragmatic, but it turned into a bit of a culture-wars clash immediately (apparently some people feel quite strongly about humans abstaining from sex), and honestly, if any US or European space program did the same, they'd have to deal with the fallout, so... it may not be the best plan.