There are some tastes that stay in your memory and linger for years. You might revisit it later, have the same item, at the same place, but it might not appeal as much. For me one such item is the Egg Puff in Chennai. I had it in Adyar at some nondescript bakery. Maybe it was my hunger, or mental state, but I could never have that kind of egg puff again.
As the Greek Philosopher Heraclitus said, тАЬNo man ever steps in the same river twice, for it's not the same river and he's not the same manтАЭ ЁЯЩГ