Fwiw, brca, I remeber wondering the same thing many moons ago.
I wonder where that saying came from? since we only have one!
Whereas I have loads of cables... they're lovely, they make all my Hi-Fi "sing". I used to have a VDH carbon interconnect which I thought was an interesting alternative for signals to travel down from the usual copper/silver wire. I wonder what the design thoughts were for this?