Tell me about Motion Matching.
Motion Matching consists of acquiring data about movement phenomena in the real world and providing a virtual representation of it automatically. As opposed to individuals hand-crafting state-graphs, Motion Matching allows movements to be selected from a dataset using an algorithm. Motion capture suits are often used to map a jointed node-like structure of human movement for the dataset. Algorithms such as nearest neighbor can then be used to predict and provide the next closest frame data using velocity data across nodes in the previous time step. For example, a human slowing down, remaining stationary on their left foot, then proceeding to move their right foot forward is likely to turn to the left.

Additional information regarding Motion Matching using a nearest neighbor approach can be found in Santiago Moreno Diaz's conference paper "Motion Matching in the Unreal Engine" (2019). Additional information regarding improvements to Motion Matching algorithms can be found in Daniel Holden et. al., "Learned Motion Matching" ACM Trans. Graph. 39, 4, Article 1 (2020).
Why do we tend to listen to a new song that we like over and over again and then we can’t stand hearing it anymore? This phenomenon is often referred to as "music satiation" or "listener fatigue." When we hear a new song that we enjoy, our brains release dopamine, a neurotransmitter that is associated with pleasure and reward. This dopamine release creates a positive association between the song and the feelings of pleasure that we experience while listening to it.

However, with repeated exposure to the same song, the brain becomes habituated to the stimulus and the dopamine release decreases. This means that we experience less pleasure and reward from listening to the song. As a result, we may start to feel bored or even irritated by the song, and we may find ourselves wanting to listen to something else.

This effect is a natural part of the way our brains process and respond to stimuli. It helps to explain why we often enjoy new things more than familiar things, and why we may eventually lose interest in something that we once found exciting.
Your answer looks kind of scientific, but does it really explain anything? You say that we enjoy something because our brains release dopamine, but does it add anything to the subject? It's a bit like saying that you go somewhere because your feet go or your car wheels turn in that direction. Aren't you just saying in fancy terms that “it is so because that's the way it is”? I apologize if that wasn't the answer you were looking for. My previous answer indeed analyzed it from a scientific point of view. Dopamine pathways which project to the prefrontal cortex and striatum are directly responsible for modulating executive function (cognitive control of behaviour), motivation, reward perception, and motor function. In the analogy you gave, it would be that you go somewhere because you are experiencing velocity towards a particular destination.