Mental stimulation, pain and discomfort, higher/lower than normal environmental temperatures, exercise, light exposure, noise, hunger, and overeating all result in an increase in wakefulness.
en.wikipedia.org Like people, fancy mice can become obese if they overeat and do not get enough physical activity.
en.wikipedia.org This had been linked to health issues such as high blood pressure, and potato chips' taste appeal caused people to overeat and become obese.
en.wikipedia.org The self-destructive behavior of injecting intoxicating drugs parallels overeating; it permits the user to experience comfort, and to feel punished afterwards.
en.wikipedia.org Appetite control mechanisms seem to strongly counteract undereating, whereas they appear weak to control overeating.
en.wikipedia.org