What Are the Features That Make Nastalgia Pleasant?

So why does the brain even do nastalgia in the first place? Like, what's going on here? Why does the brain think about the past? What advantage of any does it serve? So a couple of like axioms, a couple of assumptions that we're going to make. If someone is toxic towards methat's my and i feel emotionally hurt by them... Maybe this person doesn't belong in my life. That's my brain and mind's way of signalling to me that this could be a dangerous interaction. Things get super, supercomplicated though, and we sort of end up encouraging that person's abuse of us in some cases,. The more i've come to