Silicon Valley and Wall Street might call it “engagement.” As parents, we might call it, “getting hooked.” Social media optimizes our kids' conversations for maximum profit. There's an art to it, and nothing is accidental. Marc and David sit down with Golden Krishna, a designer at Google and the author of The Best Interface Is No Interface, to talk about the tech tools developers use to make it difficult for our teens to put down their phones or log off social media, even for short periods of time.