Random memories... what is the deeper meaning?

[Mister Obvious]

I don't really think smell is the reason either considering the difference in setting, the memory vs. reality.

For example in the memory, you're standing in a parking lot, but in the now you're laying in bed. There is no smell association.

I will go further and say that I have plenty of smell association memories and they are all well recognized as specifically being associated with smell. There's no mystery.

I believe it's either a time/cyclical or energetic correlation.