This quote speaks to the difficulty of relationships, specifically in a monogamous context. When a woman is in a relationship with one man, she might feel she is not getting enough attention or love back in return, even when she gives all she has. This can be very hard and frustrating, as the relationship may not feel balanced and might cause them both to feel unhappy. This phrase acknowledges the difficulty of this situation, and how it challenges the core of a woman’s emotions.