As of last year, the popular dating app Tinder, had 50 million users with some reports stating the average usage time per day is 90 minutes. That's 90 minutes of users flipping through images and very brief bios of other users, deciding with a flick of their finger, whether or not their interested in a person. While there's been very little research on dating apps' affect on mental health, there is some research that supports that things like regular rejection, ghosting, and feeling replaceable are having negative effects on its users. We talk to a researcher of the sociology of online dating for more.