A: Happy Valentine’s Day! Welcome to the delightful (and sometimes horrifying) world of dating apps. Flirting from your phone can be fun, as well as alluringly convenient—make a match on your morning commute!—but it’s also work. It takes time and effort to sort through the crowd to find someone you want to get a drink with, and you’re certain to face disappointments along the way. The process also inherently requires sharing personal information with strangers, who may screenshot your photos or try to find you on other sites like LinkedIn and Facebook without your consent. Here’s what you should know before you start swiping.