Well,..... if you really want to know. I tape thermal fax copies (waterproof) to the wall of the shower with masking tape. I have them layered sometimes three or four deep. I almost always have heard it first live or from a recording, and then drill the lyrics into my head by singing in the shower every day. I have been using this method for several years. As I commit the words to memory, the wrinkled old page of lyrics is pulled off the shower wall. New ones are added as needed
So, how do I learn them? in the nude... well, you asked.
alice