It is my observation that first responders see the underbelly of "civilization" that nice, shiny, polite, prim, and proper "civilized people" don't see, and often don't want to admit even exists. 

The shiny, polite, prim and proper people then like to feign horror and disgust when first responders use their "dark humor" to deal with the stuff they've seen and dealt with. 

The worst of this situations is that when a first responder has seen too many things he'd prefer to not remember, and these events come back to visit him in the dark, he sometimes ends up suck-starting a firearm of some sort. I've had to respond to one of those calls for a former fire chief from another town that settled in our town, and he used a shotgun. It was the third suicide I've seen with a shotgun, two of them before I became a EMT. They're very messy scenes. 

As we're responding to the scene, his now-widow yelled at us "Why are all these huge men in my house?!" after she had called 911. I had to bite my tongue to keep from asking "You called 911. What did you think was going to happen? Who did you think was going to respond? The Girl Scouts? Perhaps the Keebler cookie elves?"