Brendan Huhn explains National Public Radio's role as a mating signal:
For both the male and the female, listening to NPR sends a signal to a prospective mate: "Despite my current income, in a few years I will have a house in a neighborhood with good public schools, and I will drive a Volvo stationwagon." Women are sending an additional signal: "I consider myself smart and sophisticated and if I get pregnant, I will have an abortion. I might consider a three-way." Men signal back: "I won't try to stop you from getting an abortion, but I'm not afraid to cry if you do. I don't like guns, but I'm manly enough to camp and mountain-bike. I just love nature! A three-way sounds intriguing."