Once upon a time there was a rubber duck! No seriously. We are programmers, we solve problems, and every now and then, we come across problems that we never had to solve before. Once in a while we need help. Maybe we don't have the know how to solve it. Maybe we're just too close to the project to even see the real problem. Or maybe, just maybe, we just need someone to talk to, share some ideas and the problem will solve itself.
So we use rubber ducks to solve problems.