Finding Comfort in the Comfort of the Familiar

Masha writes, i am squarely in my most productive years. But whenever i feel particularly tired, i turn to the comfort of familiar things. I wonder if there is existing research that explains whether that is common and also whether the need to find comfort in the familiar increases with age. And conversely, whether the desire to try out new things requires both a positive outlook on life and the physical energy to do so....