In Why It's Normal to be a Mistress, A.A. Castor offers a provocative exploration of the hidden dimensions of extramarital relationships, challenging the notion that infidelity is simply a moral failing. Drawing on evolutionary biology, cultural history, and personal narratives, Castor reveals how the mistress role has long been shaped by societal pressures, unspoken desires, and the human quest for emotional fulfillment.

Far from glamorizing betrayal, this book delves into the complexity of female sexuality and the psychological forces that drive some women to seek connection beyond conventional boundaries. Castor examines how arranged marriages, patriarchal norms, and changing social attitudes have historically paved the way for mistresses to emerge as both subjects of scandal and symbols of empowerment. By tracing these legacies, Why It's Normal to be a Mistress provides a nuanced understanding of why certain women repeatedly choose this path, even when it carries profound emotional and relational consequences.

Through empathetic storytelling and rigorous research, Castor dismantles the simplistic judgments that often dominate discussions about infidelity. Instead, the focus is on fostering a deeper awareness of the biological, psychological, and cultural underpinnings that shape human intimacy. Readers are encouraged to reflect on their own beliefs about fidelity, desire, and self-expression, recognizing that genuine understanding does not equate to moral approval. Ultimately, this book offers a bold invitation to question long-held assumptions, expand our definitions of love and loyalty, and engage in a more honest, compassionate dialogue about the intricate tapestry of human relationships