The food within his refrigerator had begun to rot; he needed fresh provisions and a means of cooking for himself.

Or you may find they just do not do very well at all, and they actually rot in the soil.

These rotting bananas are giving off a bad smell.

But they are known as fossil fuels because they are made from decomposed plants and animals that have been buried in the ground for millions of years.

That is, code, like rotting fish, begins to smell over time.