It all came to a head one summer when a family friend (a plastic surgeon no less) complimented my twin sister's face structure. It certainly wasn’t the first time someone had dissected our differences in minute detail, but that one, off-hand comment – which suggested my profile was less photogenic – became a catalyst for my relentless pursuit of validation.While being a twin definitely has its perks (like having a constant companion), it also comes with pitfalls. For example, if your friends dub you the "cooler one", or the "edgier one" or the "prettier one", that’s the role you adopt – and may have to assume throughout adulthood. In my case, it was the "cute one", as opposed to the "sexy one".Pitting twins, and sisters for that matter, against each other happens in the home and in the media daily, from Kendall and Kylie, to Venus and Serena, to the Olsens and Gisele and Patricia Bündchen. We’re often guilty of buying into the notion that women can't be allies, thanks to tabloids frequently comparing females, and specifically sisters, from their bums, to their skin, to their style, to the number of Instagram followers they have.Of course, this is frustrating. And as psychologist Dr. Avidan Milevsky – author of Sibling Issues In Therapy – explains, being compared to your sisters can be "profoundly destructive" in that it minimises your ability to "develop [your] own individual identity."Bella Hadid admitted that she can't keep stacking herself against Gigi because, as shetold Seventeen magazine last year, "we're so different." Meanwhile, Kylie Jenner's bestselling lip kit range has reportedly rattled older sister Kim. Even more extreme, are reports that the selfie queen has been ‘spying’ at Kylie's factory. It's relentless – not to mention tacky – that Kim is interpreted as desperately clawing to snatch back the limelight from her little sister, when she's more likely lending her support. Kim dismissed claims of alleged rivalry between the pair recently on her blog , saying they "laugh so hard at this all the time."And yet, I couldn't help but watch Kylie's stratospheric rise with a mix of envy and glee. If Kylie, once a peripheral member of the Kardashian clan, could undergo a transformation that instantly catapulted her to stardom (and arguably to the top of Kardashian/Jenner glitter pile), then maybe altering my looks could do the same for me. Maybe, with the right makeup tools, I too could become the ugly-duckling-turned-swan and no longer have to play second fiddle to my sister. Perhaps with the right amount of contouring, I would feel better.Social media compounded my anxiety and gnawed at my self-esteem. I'd constantly berate myself for my inability to take a good selfie and compare it to my twin's. If I had a longer profile and more defined features, would I have received the same amount of praise online? The round-face shape which I had once loved for bagging student prices at the cinema long after my NUS card expired, no longer brought any satisfaction. Instead, I lost hours snapping rolls and rolls of selfies before realising another evening had gone by.