#pandemic life

Yesterday, I ate an entire box of Little Debbie Turtle Brownies in one sitting, among other foods, and felt terrible afterward. Tonight, I ate an entire pack of Keebler Coconut Dreams cookies (basically like Girl Scout Samoas), also in one sitting, and feel great. Coincidence? I don't know; too many confounding variables.

Why, for certain albums, does infinite replays feel as fresh as the first listen, and I learn all the lyrics by heart, whereas for other albums, all the songs blend together, make me bored, and fade almost instantly from my memory?

It's not about style or year of release. What explains it?

Some of the most satisfying sleep I get is when I am in the middle of working, find myself needing to lie down for a micro-nap, just 2-3 minutes, and then accidentally sleep for much longer. Usually this is in an uncomfortable setting, such as on a hard floor, and in an unsustainable position, such as one that puts your arm and/or leg to sleep. COnsidering all this, why is it that this sleep feels more refreshing than a typical night's sleep in a bed? Maybe the answer is just that those improvised naps are the times when I need sleep the most.

Unrelated question: why does my perception of physical wellbeing vary so wildly from day to day, while my daily habits regarding sleep, diet, and exercise barely change?