I’ve culled these comments from wikipedia as a means to collect some of my thoughts. If ever I can determine how to get permission to edit the wikipedia pages, I will update the information there.
Peer-reviewed journal articles detail the effects of natural odor from women on hormone levels in men, which are linked to behavior. Pheromone-enhanced fragrance products enhance the natural odor of women and can enhance attraction.
“The Scent of Eros” appears to have played a role in the evolution of human culture.
…he also said that chemical signals between organisms can change genetic expression. This allows the social environment to modify gene expression in individuals and in their offspring.
Copulins are olfactory/pheromonal stimuli from women (human pheromones) that appear to condition increased testosterone and sexual arousal in men.
What effect on the brain motivates us when we see food, or a potential mate?
I have elsewhere attempted to partially detail the involvement of DHEA metabolism in the production of species-specific human pheromones, but these details remain speculative.
An unknown mechanism might – if it exists — link visual input to brain activation.