For the part twenty years, the perfume industry has adopted a schema to explain perfumes to consumers and the public in general. The combination of "top," "middle," and "dry down" notes allows a fragrance to be described at the moment it evaporates, which brings out the slight dominants that escape when the bottle is opened while masking the "middle" notes for a few moments (generally less than 5 minutes). Hours later (for old perfumes with a good proportion of natural products), all that is left on the skin are the "dry down" notes, oak moss, musky, or animal notes, some of which, like civit, far from smelling like roses, play the role of binder or fixative for all the others.

For the sake of the real-life public that will be exposing itself to the whims of its virtual counterpart, an addendum to the rules of Netiquette is probably in order :

"Too much is too much." In other words, think before you click on the Scent Sensor buttons, knowing that each click is going to release one dose of a perfume component and that the resulting scent will keep changing throughout the event.

Without going so far as to say that the Website visitors are going to create a collective perfume, which would be a bit presumptuous, the idea is to produce a fragrance mix in a given location (the "Passerelle," located at Métafort in Aubervilliers) as a veritable olfactory metaphor for the Net--undulating, unstable, perpetually increasing, without any centralized aesthetic control apart from the filmed reactions of the public, which the site's online visitors should respect in determining how they want to intervene.

The whole should, in principle (if the proportions are respected) constitute a "floral-gourmand" harmony, but this will inevitably slip toward strange, unexpected, or outright disagreeable mixtures, because the point is not to improvise the work of an amateur perfumer but to realize that the medium of smell depends on the molecule--and thus chemistry--and absolutely not on waves as is the case for seeing and hearing.

The unresolved question :
Will it be possible one day to transport molecules on cabled networks like the Internet?

Answer :
When pigs have hormone implants in their wings.