There is a point where affection needs pragmatism for a marriage (or serious relationship, as this is my humble point of reference) to endure through time. I don't think that pragmatism should ever indefinitely replace affection, but is often needed to eventually see another side of affection. Having only minimal experience, and nothing monumentally enduring at the age of 23, I do not know much, but I do believe that this is an interesting thought that could prove itself in time.
*I have begun reading Elizabeth Gilbert's new book, which is her own reconciliation toward the idea of marriage. Thus, it is sure to provoke random thoughts on marriage that may seem out of place in my young, naive, and inexperienced life.