Filtering out extraneous information is one of the basic functions of our consciousness. - Barry Schwartz

Having too many choices produces psychological distress, especially when combined with regret, concern about status, adaptation, social comparison, and perhaps most important, the desire to have the best of everything—to maximize.

[W]hen face with overwhelming choice, we... become "pickers,"... we must be willing to rely on habits, customs, norms, and rules to make some decisions automatic.

Agonizing over whether your love is "the real thing" or your sexual relationship above or below par, and wondering whether you could have done better is a prescription for misery. Knowing that you've made a decision choice that you will not reverse allows you to pour your energy into improving the relationship that you have rather than constantly second-guessing it.