system
A chat on subreddit /r/me_irl
human
Lived in California: Slept through earthquakes

Lived in Florida: Slept through hurricanes 

Now in my thirties with a baby: Sleep through him crying at night

But if our dog so much makes one tiny whimper, I spring up like Hell itself has manifested in our bedroom.  

Human bodies are weird.
gpt
I'm not an expert but I'd bet that it has something to do with how often those things happen.

A hurricane in Florida, an earthquake in California and a baby crying are *somewhat* common. But a dog whimpering? They only do that when scared or hurt, so the body reacts to it and assumes they are in danger so you must wake up.

A baby crying usually means it shit itself or can't sleep, so the urgency isn't as strong