We have reached a new height of dating-app fatigue: Even the online matchmakers have given up on finding you a soul mate. It's not that you're hopeless. You're wonderful! You're a unique snowflake - so unique, in fact, that you should keep swiping and stay single as long as possible. If you've seen ads for OkCupid or Tinder recently, you might notice something conspicuous: There's little mention of love or partnership. Instead of trying to convince users that their perfect match is just a click or a swipe or a wink away, OkCupid and Tinder are touting the joy of...