I recently was told there are "human pheromones" for sale which are alleged to attract the opposite sex, but I am not up on this subject and suspect these things are snake oil whose success, if they have any, are based on a psychological change of attitude precipitated by the thought you are wearing something that will make you irresitible: a kind of self hypnosis. I am having an argument about this with a guy who claimed they worked for him. Have authentic human pheromones been discovered and their chemical makeup unraveled such that they could be reproduced in a lab, or is this bogus? I'm not asking if human scent affects the opposite sex, it obviously does, but if they have incontrovertably isolated a human pheromone that has been demonstrated to work in humans the way it does in insects. It strikes me as a stretch to suppose we'd share such a thing with such a different life form.