I was only telling a friend recently how bad my memory has gotten, yet certain smells always trigger old vivid memories for me. I have a few perfumes that remind me of specific periods in my life, and every time I spray them I'm taken back to the job I had at that time, or the house I was living in.
As it turns out, studies have shown that smells have a stronger link to memory and emotion than any of the other senses. This is thanks to the way our brain uniquely processes smells, which can tightly link specific smells with a particular memory or emotion.
Anyway, this is the exact reason I like to wear a unique perfume that not everyone else has. It might sound weird, but I don't want to smell like anyone else - that's why I love molecule perfumes like Hermetica.