Imagine waking up one day, wondering what you'd have done with your life if you hadn't listened to your parents and gone into the family hairbrush business. "Everyone needs hairbrushes," they said, waggling a warning finger at your infant face, "it's a stable job, and it's not as if you're going to be a Hollywood actor, eh?" they'd add. The only downside to this, of course, is that every day of your life is the same because, after all, every hairbrush that could have been invented has already been invented.
Then, one day you listen to the song Selfie by The Chainsmokers, and all of a sudden a bolt of inspiration hits you. Selfies are, by their very nature, an act of vanity, so why wouldn't people want to fix their hair before immortalizing themselves on Instagram? Furiously, you run downstairs to your basement design lab and, after a month of sleepless nights, using a coffee can as an impromptu latrine and emaciated from a lack of food, you emerge with the Selfie Brush.