What's THAT Smell?

I have spent the last 10-20 minutes trying to pinpoint the offender of the most ripe odor, not-so-secretly ashamed of my as-of-late poor housekeeping due to my ridiculous work schedule. (In all honesty it's not that untidy around here but vacuum hasn't met carpet in many moons.)

Perched atop a large pile of books and papers on my oh-so-neatly-organized vertical filing system on my desk in my home office was the culprit: this evening's dinner. A lovely late-night plat du fromage. Already forgotten about and discarded to clear up some space. How can something so smelly be sooo tasty? I wonder what would have happened if it had been left there for days? Actually, I don't even want to think about it.