LOVE this!
As a musician, I can attest that lyrics structured like this, containing lines that repeat with only slight variations, are actually harder to memorize than lyrics where there’s no repetition at all.
(Be sure to click the flow chart to enlarge!)
https://twitter.com/#!/JohnFugelsang/status/181400262576058369
Fish & Bicycles 
Takes me back to my first disco at age about 15. I was dancing to this with a very handsome boy…and it just went on and on and on… 😉
Hitting the disco at age 15, Helen? I’m shocked, but now I like you even more than I already did!
Ahhh but it all seemed so innocent then… 😀