This is a great article, though I'm sure it will get many heople's hackles up on this board.
http://www.theguardian.com/lifeandstyle/2012/nov/10/sex-is-monogamy-dead
Here is one good takeaway:
But that's surely impossible. In her book Mating in Captivity: Reconciling the Erotic and the Domestic, the therapist Esther Perel distinguishes between warm and hot relationships. The former involves absolute candour, togetherness, equality and, quite possibly, devising a mutually satisfying rota for picking up the kids from school and cleaning the toilet. The latter involves non-politically correct power plays and, if the book jacket is anything to go by, transgressive shoe fetishism as part of a sustainable sex life. Can one relationship be hot and warm at the same time? It seems, to put it mildly, unlikely. Does good intimacy make for hot sex? asks Perel. Again, unlikely: they don't sound like different rules, but different sports.