Poly Advantage
It seems that in monogamous relationships partners often take each other for granted. As time passes they slowly begin forgetting just how special their partner is, just how exciting that partner was when love was new.
To my mind, a large advantage of polyamorous relationships is that one has very vivid reminders of these things. Seeing ones partner openly loved and desired by another serves as a reminder of the partners value, a reminder of how special and exciting that partner is.
Being reminded of these values, of this desirability, serves to help keep one from taking his or her partner for granted. This is, I think, a fundamental strength of ethical polyamorous relationships. A strength found in neither traditional monogamy, nor serial monogamy, another reason why polyamory should be considered by those so inclined.
