Why do people get married?
It sounds like such an obvious question that most of us probably never really ask it. We fall in love. We want a family, companionship, security, someone to come home to and someone with whom we can build a life. Marriage can feel like the natural next step, shaped by love, family expectations, religion, culture or tradition. Sometimes we simply cannot imagine our future without the person standing in front of us. Still, underneath all of that is a question I am not sure many of us ever stop to consider: Why marriage? Why this particular promise?
For much of human history, marriage served practical purposes alongside whatever affection existed between two people. It organized families, property, inheritance, labor, children, social standing and alliances. Marriage has meant different things across cultures and throughout time, but today we ask an extraordinary amount of it emotionally. We still want loyalty and stability, while also expecting friendship, romance, sexual intimacy, emotional safety, companionship, shared parenting, financial partnership, teamwork, encouragement, understanding and adventure. Somehow, one person is supposed to keep seeing us clearly through decades of becoming different people. That is an enormous job description for one human being.
We have also become far more emotionally aware. We name feelings previous generations may have swallowed. We talk about boundaries, attachment, fulfillment and personal growth. Women have more financial independence than they once did, men are more involved in childcare and home life, and we are encouraged to know ourselves, speak honestly, listen to our hearts and choose lives that feel authentic. Once we open the door to feeling that deeply, it becomes difficult to pretend we do not know what we feel. Marriage introduces a very inconvenient question into all of that emotional freedom: What happens when what I feel is no longer perfectly compatible with what I promised?
I keep thinking about contracts because in almost every other area of life, we understand that circumstances change. If I lease a building for my business, I agree to a certain amount of square footage. The space may fit beautifully when I sign the contract, and then the company grows. I hire people. I need more offices. What once fit no longer holds what the business has become. I can renegotiate, expand or leave. There may be financial consequences, but we understand the basic premise that growth can change what fits.
People grow too, and that is where the analogy falls apart. A marriage is nothing like a commercial lease once two people have spent twenty, forty or sixty years building a life. There may be children, homes, families, money, businesses, friendships, responsibilities and thousands of ordinary moments woven together. You cannot simply hand over the keys and move three doors down because the space no longer fits. Still, what happens when the people inside the marriage change? Because we do.
Somewhere inside every lifelong promise, there should be an invisible line that says, I will fail you, and you will fail me too. I mean ordinary human failure. There is no possible way I can remain exactly who I was when we met or become everything you imagined I might be. You may have thought I would earn more money. I may have assumed you would become more emotionally available. My body may change. Your priorities may shift. One of us may want more physical intimacy while the other wants less. Work may consume us. Parenthood may rearrange us. One person may crave adventure while the other begins wanting a quieter life. How could it be otherwise over a lifetime?
I will disappoint my children, and they will disappoint me. I have disappointed my parents, and they have disappointed me. We hurt the people we love through selfishness and carelessness, but we also let them down simply because no human being can consistently fulfill every hope another person places upon them. Yet marriage carries this fascinating expectation that one person should somehow fill nearly every important spoke in another person’s wheel.
Your spouse may be expected to be your romantic dream, closest companion, sexual partner, financial teammate, coparent, housemate, emotional refuge, practical partner and social companion, while also standing beside you through careers, children, illness, grief and aging. We already accept that one person cannot meet every need. We have friends, siblings, coworkers, therapists, mentors and workout partners. A friend may share our love of travel. A colleague may understand the work that lights us up. Someone who has lived through a particular loss may understand our grief in a way our spouse cannot. All of that seems perfectly reasonable until we move around the wheel and reach the spokes that make everybody nervous: emotional intimacy, romantic attention and sex.
At what point does finding something outside the marriage become betrayal? If my husband does not care about tennis and I play with someone else, nobody worries. If he does not understand my work and a colleague does, nobody worries. If he becomes emotionally unavailable and another man becomes the person I turn to with the parts of myself I most desperately want understood, something changes. But when? Was it the first conversation or the first secret? Was it the first time I thought, He understands me in a way my husband does not? Was it the first time something happened in my life and I wanted to tell him before I wanted to tell my spouse?
That is what makes emotional infidelity so difficult to define. There may be no dramatic moment when friendship becomes something else. The line may have more to do with where our emotional lives quietly begin living. The question also moves in the other direction. If one spouse no longer wants sex, what happens to the other person’s need for physical intimacy? If someone desperately wants companionship and their partner is chronically unavailable, what are they supposed to do with that loneliness? If one person cannot contribute financially in the way both once imagined, how long can the other carry it before resentment enters the room?
We do not like asking these questions because the answers can threaten the structure we have built. It is easier to say, “You made a promise.” Of course we did. But what exactly was the promise? Did I promise to love you, stay, be sexually exclusive, make you my primary emotional relationship, put our family ahead of my individual wants, continue growing beside you and never make a choice that hurts you? Did I agree to all of that, at the same time, forever? I am not sure most of us ever defined it with that level of specificity. We simply said yes.
Meanwhile, the culture around us tells us to choose ourselves. Listen to your heart. Know your worth. Honor your truth. Leave what no longer serves you. Do what makes you happy. There is something important in recognizing that disappearing inside a relationship is not the same as loving someone, but there is a question missing from much of that language: What if choosing myself hurts you? What if following my heart changes our children’s lives? What if your version of becoming more fully yourself makes me feel abandoned? What if something you need in order to be happy takes something important away from me?
Once two people have built a life together, there may no longer be a clean line between my life and yours. Our growth has consequences for each other. We want the person we love to evolve, while also wanting enough of them to remain recognizable that the life we built still makes sense. If we stop growing, resentment can find us. If we change dramatically, our spouse may wake up one day beside someone they never agreed to marry. That is where jealousy, guilt, shame and resentment become interesting, because they may be protecting something we are terrified to lose.
If my husband found another woman who fulfilled an intimate need I was no longer meeting, I could understand intellectually that he had a need and still be devastated. If another man became my emotional companion because my husband was no longer available to me that way, I could believe the connection mattered while understanding why my husband might experience it as betrayal. Those contradictions do not make us hypocrites. They make us human. We want freedom and security. We want the people we love to grow without growing away from us. We want to be chosen without turning choice into a cage. We want permission to listen to our hearts while quietly hoping the person beside us never hears something in theirs that breaks ours.
That may be what makes marriage so complicated. We are asking two changing human beings to continue choosing a shared life while neither has control over who the other will become. I do not think one spouse can fill every spoke in the wheel. I am much more interested in what we owe each other when a spoke goes missing. Honesty? Effort? Conversation? Compromise? Permission? Restraint? Are there pieces of a marriage we should be willing to renegotiate as the people inside it change?
I wonder if marriage was ever supposed to mean, I will be everything you need for the rest of your life. That is an impossible promise for one person to keep. I wonder if the promise can hold something more human: I will keep telling you the truth about who I am becoming, and I will keep listening when you tell me who you are becoming too. Even that cannot guarantee that two people will always want the same life.
So I come back to where I started. Why do we get married? We fall in love. We want family, partnership, safety, belonging and witness. There is something profoundly human about looking at another person and saying, I want to build something with you. But if two people are guaranteed to change, guaranteed to disappoint each other somewhere and almost certain to discover needs neither fully understood when they first said yes, the question that stays with me is no longer why we get married. It is this: What exactly does forever ask of us once we are no longer the people who made the promise?