Julie London's song "Never On Sunday" is about setting boundaries and maintaining personal space. The lyrics describe different days of the week and the singer's willingness to be kissed on those days except for Sundays. Sunday is emphasized as a day of rest and the singer wants to be left alone on this particular day. The lyrics convey the message that while the singer is open to affection and companionship throughout the week, she values her solitude and relaxation on Sundays. This boundary is important to her and she wants her partner to respect it. The song suggests that the singer enjoys the company of her partner on any other day of the week, but Sunday holds a special significance for her personal rejuvenation. By establishing this day as her day of rest, the lyrics emphasize the importance of self-care and the need for personal space and time apart from others. Overall, "Never On Sunday" conveys the idea that setting boundaries and respecting personal space is crucial in maintaining a healthy and balanced relationship. It showcases the importance of self-care and the need to prioritize individual well-being.