I agree. This logic isn't perfect, but at the same time... I think there is no greater drive than that for sex, food, self preservation etc. I have to imagine t

I agree. This logic isn't perfect, but at the same time... I think there is no greater drive than that for sex, food, self preservation etc. I have to imagine that this drive forces you to focus and work. When you are full... sure you can devote your attention to something else. But the body also has a "rest and digest" mode. Blood flows to the core to allow digestion. Pupils constrict. The body sends less blood to the lungs, and decreases O2 exchange. Hear rate slows. These are all responses that make people want to curl up and sleep. Not create, work or work together.