Have done this as a kid. Did scribble faster, also one will sing along to memorize it and repeat it. Wait for the same song next time, compare notes. Once tape recorders came, record the songs and wrote the lyrics by rewinding for couple of seconds. Then, discovered song books!
"This generation will never know the joy of waiting for your favourite song to come on the radio"..
My mother tells me how they'd wait with their song books and pen to quickly scribble the lyrics as the song played. One couldn't just 'google' for lyrics.. imagine!