Sister Associations: What is the Purpose?

[ChaosDST]

Now that the misunderstanding is out of the way...just wanted to bring us back to the original topic.
Out of curiosity, and since this topic comes up often, what constitutes (no pun intended) a "valid," "purposeful," or "meaningful" brother/sister relationship?
Does there have to be more of an historical perspective, as opposed to just a similarity in colors, or who you feel more comfortable "hanging with," etc.? For instance, there are some Deltas who talk about "Crimson and Cream Love" as opposed to Coleman Love. Not like any of us think about love for any fraternity before the love for our beloved sororities, but since this thread is still active, I'm just curious.


Greek Love,