I’m in a polyamorous relationship, and my main girlfriend gets this question a lot. One of her friends actually asked her how it is that I “allow” her to date other guys. The assumption that she needs my permission aside, I can fully relate to your comments about communication. We date other people because we know that we are committed to each other, that we are entitled to each other’s love and affection, and that this won’t go away even if we develop feelings for others. We trust each other to keep loving each other, and we regularly communicate our feelings, fears, joy, and insecurities.