MSD

100% of the time, you can find something cheaper online than in stores. Cologne should be stored in a cool, dry, dark place like a dresser drawer, not a windowsill or bathroom. The oils will typically start to break down noticably within two to three years.
It contains synthesized human pheromones, although I question the use of SD alcohol as a carrier for a delicate chemical that breaks down in alcohol. I have used their men's deodorant (questionable quality,) bar soap (decent, moisturizes but doesn't exfoliate or cleanse pores thoroughly,) facial moisturizer (makes sking look great,) and shampoo (amazing stuff, you'll never know how good your hair can feel and look until you use an entirely alcohol-free shampoo.) The human vomeronasal organ has only one function, to react to human pheromones of the opposite sex (interestingly enough, studies that have been conducted involving male homosexuals who claim they knew they were gay since childhood found that these participants VNOs had an abronmal tendency to react almost exclusively to male pheromones.)

Societal customs over the past few hundred thousand years have allowed modern humans have evolved to the point that the VNO is all but vestigal, and large quantities of pheromones are typically required to elicit a reaction from modern humans. Despite the questionable nature and quality of the pheromone supplements you see advertised in the back of many men's magazines (not all are human pheromones,) Androstenone unquestionably activates the female (and homosexual male) VNO, and female pheromones not only excite the male VNO, but also cause the menstrual cycles of women living in close quarters (like all-girl dorms) to synchronize. I suspect that the latter was an advantage in primitive tribal life, allowing the men of the tribe to know exactly when they should schedule their monthly week-long hunting expeditions.
Damn, you're good. Hit the nail on the head.