Keep Wearing Wedding Band? [Thread #2]

[ForGump]

Dear SANDI2 or anyone else who would care to speculate/discuss:

a) What is the difference between WW and MLC?

b) I can see that someone having a MLC is very likely to become a WW/WH, though it's not absolutely necessary. For example, an MLC can just get a red sports car, take a backpack trip across the globe, and be done w/ his/her MLC. But can a spouse be a WW/WH without having a MLC? If it's not MLC that's driving a person into WW/WH, what's driving them?