A brief history of making out. Turns out “romantic, sexual, steamy” kissing isn’t instinctual behavior; it’s a learned cultural practice. A lot of societies don’t do it, most primates don’t do it, and people only started relatively recently, a few thousand years ago. On the Decoder Ring podcast, hosted by Willa Paskin and produced by Paskin and Katie Shepherd. slate.com/podcasts/…

This podcast pairs nicely with this week’s episode of Savage Lovecast, where host Dan Savage talks about primate masturbation with evolutionary biologist Dr. Matilda Brindle. savage.love/lovecast/…