Winking is one of the most intriguing forms of human nonverbal communication. Often associated with humor, flirtation, or complicity today, this subtle gesture has a long history dating back to the earliest forms of human interaction. Anthropologically speaking, the wink once functioned as a complex communication tool that could convey elaborate messages. Like Morse code, people used a series of winks to exchange stories, warnings, or secret messages, especially in times when spoken language was unsafe or impractical.