It's not really the case of perfume though, I have actually smelt a dead body. (albeit it wasn't human, but apparently it was "exactly the same") and it's really something you can never forget. I'd never be able to be a pathologist, while the idea of chopping up dead bodies might sound cool and awesome to some, the thought of doing it to a little baby who drowned in the bath, or a teenage boyfriend and girlfriend who died in a car accident is just something I could never do.
I'll just stick to making them for TV, which will glamorise it for you.