In "A Total Waste of Makeup" by Kim Gruenenfelder, the author emphasizes the simplicity of understanding a man's feelings. She dismisses the need for complex strategies to discern a man's true intentions, asserting that men are not foolish. Instead, she distills romantic relationships down to one essential principle.

The core idea presented is that if a man genuinely loves you, he will put in the effort to ensure you remain in his life. This straightforward approach encourages women to seek relationships where their partner demonstrates genuine commitment and affection, rather than getting caught up in unnecessary complications.