The Key Was Already in My Hand 02:14. A message from Min-jun blinked on my phone. “I’m downstairs—can I come up?” My make-up was still on, my hair damp with sweat. Yet my finger was already typing the entry code. Why the rush? a small voice asked, but I held my breath and waited by the door. “Come in.” Min-jun stepped inside without even untying his shoes. The heat of him—liquor, sweat, need—brushed my skin. No words. Only a mouth on mine, hands around my waist. The pop of a shirt button ricocheted off the window. In that instant, I thought exactly one thing: This is the last time. I swear it. --- ## Why Do We Want to Break Each Other? The cruelest truth about casual sex is not that bodies are traded, but that expectations are. You repeat the mantra: I want nothing. Yet the moment the door clicks shut, an emptiness swells. > “I told myself I only needed his body—so why does my chest feel hollow?” We try to turn each other into instruments, hoping skin can substitute for what we can’t grasp. But human beings are never that simple. When you trace Min-jun’s jawline in the dark, it isn’t just for the feel of it. --- ## Eun-jin, 29, Opened the Door Twice Eun-jin slept with Seok-jin on the third day after they met at a hobby club. Day one: drinks. Day two: a film. Day three: his studio flat. “Let’s keep it light, okay?” he said. She nodded. Inside, she thought, Maybe this is only the beginning. For a month they met twice a week. After sex, Seok-jin always had the same line: “I’ve got an early shift…” She believed him—he worked at a start-up. Until one evening a photo appeared in the club chat: Seok-jin holding another woman’s hand, same café, same hour—three hours after Eun-jin had left his bed. > “Why am I furious? We agreed to keep it casual.” That night, Eun-jin wiped her eyes in the restroom and texted him: Could I see you just for tonight? Once again, she stood outside his door. --- ## The Second Pick-Up, and How to Forget Case two: Hyeon-su and Seo-yeon. He approached her in a club with a single sentence: “I want to sleep with you.” She refused at first, then found his bluntness oddly refreshing. Fresh from a long break-up, she asked her body to erase the memories. For six months they kept an agreement without a contract. Hyeon-su never forgot the condoms; they were his contract clause against feelings. One day Seo-yeon caught the flu and went silent. Hyeon-su showed up at her door. “Why didn’t you come out?” He held her in the hallway. She whispered, “Could we just watch a movie—like friends?” His face hardened. “That wasn’t the deal.” He stepped back. --- ## Why Is the Forbidden So Sweet? The strongest aphrodisiac in casual sex is the taboo. We mistake the absence of belonging for freedom. The opposite happens. While convincing yourself you expect nothing, you begin to expect everything. Psychologists call it the sacrifice-reward imbalance: what you give keeps growing, what you receive stays the same or shrinks. To avoid admitting the imbalance, you lie: I’m not the type who hopes. --- ## What Begins When the Door Closes In the end, casual sex costs you more than time or emotion. The heaviest blow lands on the belief that you’re immune to hurt. After Min-jun left, I almost tore the sheets. The scar where the button flew off was still there. Why am I so angry? I had opened the door for him, but when it closed, no one opened a door for me. --- ## Do You Really Think You Only Gave Your Body? Somewhere right now, two people are lying with the phrase “just tonight.” Yet your phone on the bedside table stays silent. Still believe it was only flesh? Then why are you still standing at the door?
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