We receive a lot of fantastic show ideas from our listeners—and we’re grateful for each and every one. For our latest mailbag episode, we’re tackling five of your questions, including “Why the hell do we teach kids to play the recorder?” (We’re paraphrasing a bit.) Also: We’ll explore the rise and fall of the stretch limo, the incredible versatility of the word “like,” the meaning of the “Baby on Board” sign, and why it took so long to develop luggage with wheels.  Decoder Ring is produced by Willa Paskin and Katie Shepherd. This episode was also produced by Rosemary Belson. Derek John is executive producer. Joel Meyer is senior editor/producer. Merritt Jacob is our senior technical director. Thank you to every listener who has submitted a suggestion for an episode. We truly appreciate your ideas. We read them all, even if we don’t always respond. Thanks for being a listener and for thinking creatively about this show.  If you haven’t yet, please subscribe and rate our feed in Apple Podcasts or wherever you get your podcasts. And even better, tell your friends. If you’re a fan of the show, we’d love for you to sign up for Slate Plus. Members get to listen to Decoder Ring without any ads. Their support is also crucial to our work. So please go to Slate.com/decoderplus to join Slate Plus today. Learn more about your ad choices. Visit megaphone.fm/adchoices