When attempting to rotate a disc about two perpendicular axes that are fixed to the body, the resulting motion is complex due to the interaction of angular velocities and torques. The discussion clarifies that the angular velocity is a function of time, leading to a motion that appears different in a space-fixed frame. The Euler equations are essential for analyzing the dynamics, as they relate the angular momentum and applied torque. The moment applied to the disc, denoted as ##\mathbf{M}##, is crucial for understanding the system's behavior. Overall, the conversation emphasizes the intricacies of rigid body dynamics and the importance of properly defining the axes of rotation.