This is a food I greatly miss, as I've been living outside of Sweden for many decades. In fact not all Swedes love it either, only most Swedes from the northern half. :)
The smell is similar to poop yes, but you ALWAYS eat it outside, and you get used to it. And the taste is very salty and wonderful, especially with fresh boiled potatoes and heavily buttered crispy bread. And some beer and vodka.