This conference talk from Devoxx Greece 2025 explores the complex world of fine-grained authorization through Relationship-Based Access Control (ReBAC). Discover how ReBAC offers solutions to authorization challenges that traditional Role-Based and Attribute-Based Access Control systems struggle to handle. Learn about defining complex relationships like friends-of-friends permissions and conditional access scenarios that typically require custom business logic implementation. Through live demonstrations and a humorous canine perspective, explore how to deploy your own fine-grained authorization service. The 41-minute presentation by Ben Dechrai provides practical insights into implementing sophisticated access control systems that can scale effectively while maintaining security and flexibility.