I didn't know what made things tick. I didn't know what made people want to be friends. I didn't know what made people attractive to one another. I didn't know what underlay social interactions.
Source, in full
Discussing his high school years. Quoted in Michaud, Stephen; Aynesworth, Hugh (1999) The Only Living Witness: The True Story of Serial Sex Killer Ted Bundy (Paperback; revised ed.). Irving, Texas: Authorlink Press. pg. 66