It's almost summer. Hot day, and I left a parcel of natto out to defrost. Forgot about it and left the house. As I was entering the flat, my elderly lady neighbour told me there was a horrible smell coming from the open kitchen window.
"I think you have a dead rat," she confided. I invited her in and lo and behold, it was the natto. She was not impressed I can tell you!
What does natto smell like to you? It smells like sweaty feet and deliciousness to me :-)