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.
The self-destructive behavior of injecting intoxicating drugs parallels overeating; it permits the user to experience comfort, and to feel punished afterwards.
Before marriage, girls intentionally overeat and perform limited physical activity for 40 days in order to be attractive for their soon-to-be husbands.
