In a few days, I’m going to Cuba on vacation with a guy I’ve been sleeping with for eight years, but whom I've never once called my boyfriend. We live on different continents, but inevitably, a few times a year, we find each other somewhere in the world, have a few days of romance, and then go our separate ways. This arrangement would generally be called a friend with benefits, or a fuck buddy, or a romantic friendship, or perhaps even a relationship—with “no strings attached.” But let’s be real: There are always strings, aren’t there?

It was while planning this vacation that it hit me: The two longest relationships of my life have both been with men who I was never officially dating. Boyfriends and girlfriends have come and gone, but my friends with benefits have stood the test of time. I mean, eight years. That’s longer than I predict my first marriage will last. And while I can’t imagine being with my Cuba date “for real”—I mean, he’s a low-key homeless anarchist who once took me on date to his Sex and Love Addicts Anonymous meeting; there are red flags—I still value our relationship immensely. And he actually knows me better than a lot of my partners ever did. So what is it about the friends with benefits dynamic that is more sustainable, and often more transparent, than an actual relationship?

People are skeptical of fuck buddies. They’re like: How can you have sex with the same person, again and again, without falling in love? Or at least, without getting super-jealous and Fatal Attraction–esque? Some assume that one of the “buddies” is always being strung along, secretly hoping that the fucking leads to something more serious. Others dismiss fuck-buddy dynamics as just being compulsive sex that’s devoid of emotion. But why do things have to be so black and white? Surely it’s possible to find a middle ground between eternal love and zombie-fucking a stranger: a place where you can care about someone, have good sex, and yet not want to literally implode at the thought of them sleeping with someone else. Right?

Case in point: The most significant romantic friendship of my life was with an ex-editor of mine, whom I’ll call Malcolm. We started “a thing” five years ago and have yet to end it. When I met him, he was 45 and charmingly grumpy, and he would always tell me: “Sex is so perfect. Why destroy it with a relationship?” I’d go over to his apartment for a couple hours in the afternoons, we’d have sex (soberly, which meant I could actually cum), and then afterward we’d drink tea and complain about stuff. It was the best.