"I recall thinking that The Watersons weird harmonies..."
Hardly "weird Al" - pretty run of the mill compared to polyphony or some of the part-singing found in general use all over the world - even as far out-flung as some of the church singing in the Hebrides - " way out foreign"
You really should try to get out more - take a break from the 'three-chord-trick' maybe
Jim Carroll