system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are dogs way more happy/excited to someone, and humans aren't?

A dog might go halfway psycho, run around the house, and jump on the person to smother them with kisses. But we will simply say "hey." What's with that?
gpt
Dogs take a lot less to be happy. When you're gone, all they do is wait for you to return. If you're gone for a few hours, that's a lot of time for them to sit and get more and more excited for your return. Humans will keep themselves busy, and don't spend hours anticipating your return.