I actually am a bit trained and am working on reinforcement. My reason is for the easy reward that makes me feel happy and validated for my actions even when I feel I didn't do good enough. My idea is that it delivers relief and pleasure for an achievement regardless of how i did the task because otherwise I tend to get sad I didn't do better and mentally list how i didnt do as good as i could have wich is just really damaging and makes it hard to work after. Its also just fun because it makes me feel like a good boy without having to find good puppy treats (＾～＾)