Why did you choose to be monogamous?

Some of my relationships are monogamous. The main advantage to them is that they take less time and effort. They can also reduce drama

Unfortunately monogamy involves creating an artificial monopoly on physical and emotional intimacy. The problems with monopolies that you learn in economics class apply to relationships too and constitute or cause a lot of the 'drama' of relationships. The Nash equilibrium in games modelling monopolies are very different from those without a monopoly and human instincts often reflect that difference depending on context.

Since that fateful day, I've been involved in both polyamorous and monogamous relationships, and I've become quite confident that I am happier, more fulfilled, and a better romantic partner when I am polyamorous. This holds even when I'm dating only one person; polyamorous relationships have a kind of freedom to them that is impossible to obtain any other way, as well as a set of similarly unique responsibilities.

This is counter-intuitive but I find it reasonably accurate. On a related note studies show that women orgasm more often and more powerfully when their partner has been with an other woman even if they are not consciously aware of this fact.