Here's something on the nose & pheromone receptors;

Which receptors bind pheromones in the nose?
There is heavy evidence that the vomeronasal organ (also called Jacobson’s organ) acts as the pheromone receptor. It is a little sense organ (part of the "sixth sense") just beside the cartilage of the nasal septum and just beside the olfactory nerve. It is only stimulated by pheromones and not by odours, while the olfactory nerve is only stimulated by odours and not by pheromones.
[link to med-vetacupuncture.org]