How can I convince my wife that owning a hurdy gurdy is critical to our well being?
The rotating of the wheel creates a magnetic field which, although completely unmeasurable in any way, actually aligns the magnetic field of your community and subtly corrects any misalignments in the earth overall. This creates a borealis effect which removes invisible stresses from the localized field around your home and adds to the possibility of world peace and sense of well-being.