Junkie Librarians

Here's a bit from Mind Hacks, pointing to a "highly speculative" article about information-seeking behavior. Professor Irving Biederman (University of Southern California) posits that

the moment of finally understanding something causes a release of natural endorphins in the brain, providing a response to knowledge acquisition that conditions us to want more.

In other words, intellectual curiosity may be driven by an addiction to an opioid high.

Hey, don't bogart that encyclopedia dude!