there are many blues-the music kind (blind willie, etc.), the sad kind, the balls kind, the stage light kind.
the coil/wind thing is about about a Gibson P-90 (pickup, for and amp:
http://www.harmony-central.com/Guitar/Data2/Gibson/P-90-01.html)
so, once again, it's about love being the power behind music. or something. i get sort of abstrusely technical at times.