Slate Plus members get ad-free podcasts and bonus episodes of shows like Dear Prudence and Slow Burn. Sign up now to listen and support our work. Jenna Karvunidis invented the gender reveal party, but now she has regrets. On this episode of Decoder Ring, we explore the pink and blue world of the gender reveal party, and how Jenna's small barbecue celebration turned into a global phenomenon that's gotten way out of control. We talk to psychologists, historians, critics, and business owners, to figure out why the gender reveal is having such a big, bizarre moment right now, and how we can best understand the strange power they hold over social media. Learn more about your ad choices. Visit megaphone.fm/adchoices