lysssmcdermott:

I find it amazing what a scent can do. The simple aroma can trigger a memory and send you into a sea of emotions. A food, a perfume, a shampoo. The simple everyday scents can smack you in the face one day at any moment. And in that moment you are flashed back to the exact time when you told…

I imagine there is a reasonably accurate way to identify smells by their particular chemical composition.  These are encoded by your amygdala when you inhale an odor as a memory tagged to that chemical make up. 

It stands to reason we could dissociate that smell from the memory through repetition.  “Training” your olfactory system to respond differently to the smell.

Erasing your memory.