Vienna you are correct, perfume is an emotional reaction to a I must have that or a memory. Many perfume boards especially Basenotes male forum are very very very into the technical side, batch numbers, which one is the better batch etc. Think of it as someone very into cars, the make, model etc are very important to them. It seems to be a man thing.
I once tried a sample of a perfume and my first thought was, "That is the smell of the inside of my mother's handbag when I was a child!". It was Amouage Ubar(before they reformulated it, no idea if it still smells like that?), I just had to buy it for that reason.
I owned Samsara when it first came out, the a woman at work started wearing it. So day in day out for weeks all I got was Samsara blasting at me across a desk. I hate the stuff now, I can spot it in a busy street if someone is wearing it. I won't go into another woman who drown herself in Escape each day, it might have been a whole bottle at a time. I developed a total hatred of Calvin Klein and wished he had been strangled at birth. I can't even go near any CK fragrance to try it.