Married Couple To Mars?

Dennis Tito is considering using a married couple as the two-person crew in his proposed 501-day flight looping around Mars.  He reasons that a married couple would already have a deep commitment to each other and accustomed to being in intimate situations together.  He also argues that having a man and a woman in the crew would allow all children to identify with someone of their gender.

It's an interesting approach to an interesting concept.  We'll see how far the project gets in reality.