"You Don't Fool Me" by UFO is a song about not being easily deceived or fooled by someone's actions or words. The lyrics reflect a sense of self-awareness and a resistance to being manipulated or taken advantage of in a relationship. The song suggests that even though the persona is aware of their partner's tricks and games, they are willing to play along and enjoy the momentary pleasure or attention that the relationship brings. The persona acknowledges the ups and downs of the relationship, acknowledging that their partner has the power to both build them up and bring them down. Despite the tumultuous nature of the relationship, the persona expresses a strong desire to be with their partner and experiences an intense attraction towards them. The lyrics mention the fire and heat they feel when they are together, highlighting the passionate and irresistible nature of their connection. In summary, "You Don't Fool Me" portrays a complex romantic relationship where the persona is fully aware of their partner's manipulative behavior, yet chooses to indulge in the thrill and intensity of the relationship.