The link to the NY Times article below is a means to help convey the importance of odors, whether or not they are consciously perceived. Simply put, pheromones affect behavior whether or not we smell them.
“A single picture, a few choice words and, yes, a slight odor can elicit a surprisingly intense reaction.”
October 23, 2010
All Politics Is Olfactory
By PETER LIBERMAN and DAVID PIZARRO