Sex on Mars: A Dangerous Love Story Mashable

When Jane first met John, she knew that they would spend the rest of their lives together — literally. The pair spent more than eight years in space flight training before leaving Earth without the possibility of return.
As members of the first Mars colony, Jane and John naturally gravitated towards each other because they share the same future of an isolated life on a new planet. And as their mental bond grew, so did a fervent, passionate physical urge for each other. Now they face an obstacle for which they never trained: sex on the Red Planet.
Jane and John are fictional characters. But if a handful of Mars colonization projects have their way, their lives could be a reality in just 10 years.