system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is it harder and harder to get a full night sleep the older you get?
gpt
The cumulative effect of a life-time of alcohol, stimulants, sedentary life-style, overeating, rumination, rejection, heart break, loss, regret, humilation, meaninglessness, sadness, rage and the creeping fear of impending death.