I think the dissonance between opinions here is mostly due to the use of terms that not all understand in the same way. I don't think anyone is saying that perfumes have various and palpable
chemical reactions on different people's skin. That's flatly ridiculous unless you're some kind of mutant or the perfume had ingredients that really shouldn't be in a perfume.
On the other hand, people do have individual scents. Whether these individual scents are natural, a factor of individual make-up, hormones and environment, things like daily scented products (shampoo, soap, clothing detergent) is not really important to the point, so others can argue where that individual aroma comes from. But it is there.
If someone completely baseline, an almost impossibly neutral control subject were to wear a perfume, it would smell one way. I imagine the perfume on them would smell almost like it would on paper.
But... if you were to spray that same perfume on someone that had any combination of the following:
- oilier skin (and skin oils are
important... anyone with an appreciation of perfume fixatives can come to this realisation as it effects both the tone and longevity of the perfume)
- products that have left other perfume notes on the skin
- perhaps their skin temperature is higher/lower and causes the perfume to dry down in a slightly different fashion, which can change the natural unfolding of the note structure, something I'm sure we've all experienced before
- also, if sunlight can effect scent molecules in bottled perfume over time, consider that the molecules in a thin layer on the skin will be broken under sunlight... so whether the perfume is being worn indoors, outdoors
- the environment itself
coming into play adds myriad more factors.
I'm just listing a few factors off the top of my head, I'm sure those reading could add more. But all of these factors will change the scent a little
as someone is wearing it.
Is it "skin chemistry"? I don't think it's a helpful term to use as apparently it seeds a lot of misunderstanding. Does it have to do with the chemicals on someone's skin? Yes, sure. Is it a chemical reaction with the skin itself? No. Or, at most, barely. Other factors are much more influential.
Are perfumes going to be different on various people? Unless you can isolate yourself from all the points on that list, your perfume is going to smell at least a little different from how it does on the impossible control or a paper strip. That said, it may not always be perceptible. And if the person next to you shares most of those factors with you, you'll probably end up smelling very similar!
Are some perfumes more likely to change scent than others? I'd say yes. Perfumes that have better fixatives, perfumes that have higher odour impact and longevity are going to remain "true" longer than others. They're just not as easily pushed around.
Can we stop with the dick-sizing and slapping now? Or, if you guys are still super keen on it, can I join in?