[lapcat]

> Does the author never listen to a song more than once?

Listening to a 4 minute song isn't much of a time investment compared to reading a book.

Also, songs are entirely different beasts. They're designed to be repetitve — e.g, the chorus — and generally aren't plot-based, so there are no spoilers. And music is often more of a background activity than a foreground activity.

[RoyalHenOil]

Reading a book isn't much of time investment, either, depending on how quickly you read. I read most novels in just a few evenings (sometimes just a single evening if I'm really into it), and then I'm out of books I'm interested in reading for a while. Even though I re-read all the books that I like multiple times, I still have more reading time than reading material.

When I'm out of books I want to read (which is most of the time), I just switch to some other activity — like watching YouTube or reading my phone — in the hour or two before bed. But these are a lot more disruptive to my sleep than books are.

If I had a policy of never re-reading books, this situation would be a lot worse.