system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do dreams always seem to end at the "good part"?

Right when you hop in the Lamborghini, or when she climbs into bed with you, or just before that Kamehameha?

Though not before that time Vegeta beat me up (true dream story)
gpt
There is actually a reason for this. Sleep is essentially just a reduced state of mental activity. When you start getting excited, emotional, sexually aroused, or anything else because of a dream your brain begins increasing its level of activity and you wake up.

Simply because it is the best part is why you wake up.