It’s been more than 2 decades since the work of Axel and Buck replaced the ridiculous misrepresentations of those who appear to have never once thought about olfaction for finding food in birds.
the epigenetic effects of nutrient chemicals and pheromones that enable the ecological, social, neurogenic, and socio-cognitive niche construction that is responsible for our adaptively evolved behavior.
it is also clear that nutrient chemical-dependent gene duplication is a mechanism of genomic adaptation to a changing environment (Kondrashov, 2012), and that pheromones epigenetically control nutrient dependent-speciation
Fragrance use adds to the appeal of men’s axillary odors.
Biologists are becoming more familiar with these processes, which many psychologists seem to think require a brain and perception.
“I should think we might fairly gauge the future of biological science, centuries ahead, by estimating the time it will take to reach a complete, comprehensive understanding of odor.”
Changes driven by the evolution of our olfactory acuity and specificity also rule out domain-specific modules.
We cannot directly link any individual gene, cell, tissue, organ, or organ system to any behavior without including the rest of the pathway that links gene activation to brain-directed behavior.