This should probably be on the guy's board but as long as we are here...
I think it is pheromones augmented by just the right fragrance. The fragrance gets you to breath deeply and the blend of it and the pheromones (natural not the bottled stuff) make the chemistry work.
I recall many years ago a beautiful lady who was nice and friendly and an interesting person but there was no chemistry there. One day I went in to where she worked and she was wearing Poison. For her it worked! I was extremely, and obviously, taken with her from that moment on. Nothing ever happened, two different worlds, you know. However to this day I remember her. Yasmin, if you are reading this the allure is still working after all these years!
The right combo is what makes it all work.