This paper revises aesthetics theory through the lens of authenticity and investigates practical applications using a co-design approach. We encourage designers to include ordinary clients as co-creators in the co-design process, guiding them in expressing their aesthetics, values, and preferences while stimulating their creativity. This paper proposes a bespoke design process framework for authenticity aesthetics that incorporates empathy, defining, ideating, prototyping, and testing. This framework delineates the roles and responsibilities of clients and designers at different phases and highlights evolving material mediums that enable their communication. The paper concludes by reflecting on consumerist aesthetics, advocating for designers to focus on the insights of ordinary clients, design for their authentic uniqueness, and recognize the broad prospects of bespoke design methods.