I'm not sure how this plays into it, but I think it does.

I had an opportunity recently to smell dead people in various stages of decomposition over a period of a couple of weeks. It was the most completely repellant aroma I have ever smelled. I never got accustomed to it, as most of us become accustomed to unpleasant smells in a few hours or a day. It was so distinctive it was like I had a nose radar. I could smell a swollen, dead human and differentiate it from dead animals from a block away. Even if the body was inside of an attic. I don't know why. I can tell you that right now and unto the end of my life I will never forget it.

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