Meaning of "Password" by Ben Folds

The lyrics of "Password" can be seen as a commentary on the intricacies of relationships and the perception of knowing someone. The protagonist of the song appears to have been meticulously observing and taking note of various details about the person they are singing about, believing that this understanding equates to knowing them deeply. However, the revelation that they were incorrect in their assumptions highlights the idea that true knowledge of a person goes beyond surface-level details. It suggests that despite efforts to pay attention and gather information, some aspects of a person's essence may remain elusive. The song can be interpreted as a cautionary tale about the dangers of assuming intimacy based solely on external observations and the importance of genuine connection and communication in relationships.