Relationships outside of marriage

[Isabelle90]

Many have said that a D/s relationship is one of honesty and respect. If someone is in a D/s relationship outside of a marriage, presumably vanilla, how can either of them (D/s couple) know that the other is being honest?

When is it "okay" to have a relationship outside of marriage? If someone realizes they are dominant or submissive but their spouse is neither, is it appropriate to start a new relationship with someone that is in the lifestyle?

It seems, to me, that this is not an uncommon practice, and I was curious as to what others thought of the matter.

Personally, I am a more "concrete" person. That is, grasping my mind around an online relationship is much like reading something by Stephen Hawking. It takes some time for it to sink in. I need to see, touch, taste, smell, and hear. I don't possess the sixth sense. "Abstract" does not really appeal to me as much. Ye of little faith and all that?