Last week, we solicited your questions about dating, sex and love. This one came from 17-year-old, Arthur, who lives in Pittsburgh: I am a senior in high school and I have never been on a date. Should I be worried about this? When I do finally meet someone, will I be hurt by my inexperience? On today’s show, economist and author, Tim Harford, applies economic theory to Arthur’s question. He also tackles polyamory and offers suggestions on how to change your spouse’s behavior.