Serial Monogamists Make Me Sick

I'm not necessarily against monogamy, but I am anti-serial monogamists. What are serial monogamists? These are people who can't be single, that always have to have a partner yet insist on one partner at a time. How can you enjoy life living like that?! I guess if I were to have a pet peeve (thank you, Mike Pelayo), this would be it.