system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: Why do some sounds, like dragging your nails on a black board, make us queasy?

I personally can't stand hearing the noise of a felt tipped marker pressed hard on paper while writing or drawing something down, as my body feels really cold all of a sudden and I feel queasy. What is the reason behind this? Does it have an evolutinary explanation that can be explaimed like I am five?
gpt
This is actually a **fascinating** question with an equally interesting answer. 

So you know how most primates live in groups, right? Well, most have a scream that pretty much means "get the fuck out, something bad is going down" to signal about predators or other serious danger. Obviously early humans killed most of our closest species, but our closest relative alive today has a scream that hits frequencies very similar to the chalkboard sound (and they also someone's don't like the chalkboard sound).

Also, it's been shown that people have different levels of reaction to the chalkboard sound, and that it seems to be at least partly inherited (i.e. if one person in your family isn't bothered by it, you probably aren't either).

The hypothesis is that humans used to have an instinctive "get the fuck out" scream too, but that it's no longer important and we've more or less completely lost the ability to do it. However, the instinctive reaction to go on alert (uncomfortable, hair standing up, suddenly feeling anxious) when hearing the scream is still there in some/most of us. The chalkboard screech and similar sounds just happen to be close enough to our ancestors' panic scream that they can trigger it.

Does that make sense?