In J.D. Robb's book "Big Jack," the quotation highlights the often humorous and complicated nature of relationships. The notion that you must share extensive and intimate time with someone for them to be considered an "ex" suggests that the depth of connection plays a crucial role in defining past romantic entanglements. Such a statement adds a light-hearted perspective on the thresholds we create in our personal lives.

This quote encourages readers to reflect on what truly constitutes a past relationship. It implies that emotional and physical intimacy significantly influence how we perceive romantic history. Ultimately, Robb's work invites contemplation about the impact of meaningful connections and their lasting effects on our lives, underscoring the unique bonds formed between individuals.