Smell is the most vivid sense for long-term memory. At age 4, I clearly remember the first day of school from smell of Ajax in the kindergarten bathrooms to the fresh duct tape on the worn out plastic leather seats of the school bus. And for lunch, my mom made me a hotdog with strawberry jam. It was the first and last time I had that for lunch. She never made it for me again, but I never told her that I didn’t like it either. I’m 100% sure we ran out of ketchup that day.
