"At the tip of the noses of mammals, including humans, is a ball of nerve cells known as the Grueneberg ganglion, named after Hans Grueneberg, the scientist who described the structure in mice in 1973".

It's interesting Einbar. On a personal level, I don't put too much stock in pheromones, but I know others who swear that they cannot be around an individual unless they "smell" right to them. Too much sniffing for me, I guess