Breakups are never easy. To overcome them and regain a sense of self-worth and confidence, beauty consumers are turning to haircuts as a symbol of renewal. After all, with a new ‘do is a new mentality and hopefully, in time, less stress (think Brad Pitt’s spikey-haired, hunky guru Tyler Durden’s advice in “Fight Club”: “Stop trying to control everything and just let go!”) That’s why the warrior cut and low-tension hairstyle are the moment’s fastest-growing hairstyles per Spate’s Popularity In...