People form intimate relationships based on their values, and they desire partners who represent their own values. This is a major theme in Atlas Shrugged--that our emotions and bodily desires are informed by our beliefs, and is also an important theme in The Fountainhead.
As far as marriage with someone who holds a philosophy not considered compatible with Objectivism, there are many examples of such marriages that have worked successfully. The degree of success such a marriage can find is based on how strongly each person identifies with and actually practices their philosophy. A true Objectivist whose primary identity is based around those values would never be able to make a successful marriage with a true environmentalist or Christian whose primary identity was based around those values because they are simply to far apart. On the other hand, more casual believers in religion, environmentalism, etc. may have much more in common with Objectivists than with the philosophy they consciously identify with. In that case, it is certainly possible to make a good relationship, and with exposure to Objectivism it is also quite possible that such people will make a transition to consciously identifying with Objectivism and abandoning their previous beliefs.
answered Sep 21 '10 at 21:31
It should be considered that marriage is a very long-term project, and people usually change over time. When you start out farther apart, there may be more difficulty due to this. At a minimum, it is important to understand how your philosophical differences make you evaluate a whole range of incidents and alternatives differently. You should know intimately how the two of you think differently.
answered Jan 03 '11 at 19:22
Mindy Newton ♦