The way I see it, raw foods could become useful in a journey through space. I suspect that raw-foods work better at slowing down(if only slightly) the deterioration in physical health due to exposure to zero-gravity for long periods. Once reaching Mars, the effects of low gravity there could be alleviated by astronauts wearing much heavier spacesuits.
Raw plants could be grown in a spaceship if sufficient energy was provided re artificial sunlight etc., no doubt requiring a futuristic fusion reactor and hydroponics. Raw animal foods could be obtained either via long-term freezing or by having small mammals(rats?) in the ship which would feed on the raw plants.
As for the sex issue, in a real space journey(except possibly with a very large turning spacecraft simulating earth-gravity), that wouldn't be an issue as zero-gravity would make sex a very difficult proposition. That said, I have always wondered if someone has ever had sex in space. I have noted that Nasa has allowed married couples as astronauts on the same space-shuttle mission, so I suspect that they probably did some top-secret "experiments" in this regard. It's important as the human inability to carry a pregnancy to term in space is a hindrance to colonising space.
The 1 thing that has annoyed me is the total lack of interest in spaceflight among governments. Nasa has had its budgets slashed routinely by retarded presidents and so on. What should happen is that different regions should pool their resources and each government in those regions allocate 0.5% of their budgets to space - that way Europe or North America or Asia could get to Mars in double-quick time. Also, there are some promising technologies which should be used such as Project Orion(ie the use of exploding nuclear fission bombs as fuel). Granted, you would have to have such a spacecraft using that technology only from the Moon not from the Earth, but it would mean speeds as high as 8-10% of lightspeed if nuclear fusion was involved, and 3-5% if nuclear fission was involved.
