In all of these the desire is to be unselfish.
Socialism - This is born of the desire to have your wants and needs provided by others. Selfish.
Marxism - Primarily driven by a desire to control others. Selfish.
Wife swapping, public tolerance and even celebration of immorality - Covetous, to begin with. Furthermore, sins of this nature are driven by the ones desire to "do things my way by my rules" while rejecting God's law. Those who push for public tolerance and/or celebration of perversion and immorality are doing so because of their own perversion and immorality. They're the same who want to shut down conservative talk radio because "it's offensive." Selfish.
Sorry, but the tolerance for socialism, marxism, and wife-swapping arises in the great majority out of a desire to be selfless, and out of a impaired sense of self.
For some — the bullies of life — it is selfish, sure. But for the majority who get caught in them, it is a lack of strong sense of self that allows them to become trapped by the trappers of men.