You know, among the religious, there are still a few people out there who swear vows of chastity and go their whole life without sex. It's not really an irresistibly powerful human need like, say, oxygen. If there's a real good reason like SPACE I'm sure we could find a few qualified people who would be willing to abstain for the rest of their life; it's not a deal-breaker on the scales that the earliest space colonies will be recruiting from.
Granted, long-term colonization with a permanent population is obviously going to need some (and it will probably be small-town awkward for a while, and having your family life be everyone's business because of population and resource planning may be an interesting step backwards for today's liberated culture) but we can worry about that after we have nonzero population on Mars.
Granted, long-term colonization with a permanent population is obviously going to need some (and it will probably be small-town awkward for a while, and having your family life be everyone's business because of population and resource planning may be an interesting step backwards for today's liberated culture) but we can worry about that after we have nonzero population on Mars.