Failed relationships often feel like a significant loss, akin to the wasted effort put into make-up that goes unappreciated. This perspective highlights the emotional investment one places in relationships, which, when they end, can leave a sense of emptiness and regret. The metaphor suggests that just as make-up is intended to enhance beauty but can ultimately go to waste, so too can the time and energy spent on a relationship that did not flourish.

In Marian Keyes' "Watermelon," this sentiment resonates with many who have experienced the disappointment of love that didn't last. It reflects the painful realization that not all efforts yield rewarding outcomes, and some relationships, despite our best efforts, may not provide the fulfillment we seek. This realization can serve as a valuable lesson in understanding the dynamics of love and commitment.