Penn and Teller did a segment on their show "Bullsht" about pheromones that basically said they were, well, bullsht. They sprayed one of two identical males with the 'mones, and the other with a similar scented cologne without pheromones and asked various women which had more sexual appeal. At first the women were choosing the pheromone-dosed guys. But after they switched up the order, they discovered the women were simply choosing the second guy, every time, regardless of their cologne.
Thoughts?