Lyric discussion by girabbit 

Cover art for Narcolepsy lyrics by Ben Folds Five

BEN FOLDS CLEARLY STATES in his "Ben folds and WASO live" performance of the song that this song is about how the majority of guys shutdown/withdraw emotionally when they feel really happy or upset. He says that he is one of those who do. It's NOT about real narcolepsy.

Have a listen to that version and his explanation.