A growing body of research indicates that odors can condition motions and subsequently influence behavior.
This happens becouse odors and emotions are processed in similar brain structures.
Moreover, odor-evoked memories may seem clearer or more intense than other memories because they appear to be more emotional than memories triggered by visual, audio or other types of cues.
A special class of volatile molecules, as odors, are pheromones; these compounds are chemicals that triggers an innate behavioural response in another member of the same species;
Recently, scientist found that even human pheromones affect the sexual attractiveness of men to women and vice versa.

. Authors: James V. Kohl, Michaela Atzmueller, Bernhard Fink & Karl Grammer
Review: Neuroendrocrinoly Letters, NEL VOL. 22 No. 5
Title: Human Pheromones: “Integrating Neuroendocrinology and Ethology”

. Authors: Ehrlichman H, Halpern JN
Review: Journal of Personality and Social Psychology, 1988 Nov;55(5):769-79
Title: Affect and memory: effects of pleasant and unpleasant odors on retrieval of happy and unhappy memories

Authors: John P. Aggleton, Louise Waskett
Review/Source: British Journal of Psychology;  Vol. 90 Part: 1 Pag. 1 – 7 (abstract)
Title:  The ability of odours to serve as state-dependent cues for real-world memories: Can Viking smells aid the recall of Viking experiences? – PDF

. Author: Unspecified
Review: Web Page
Title: The Smell Report

. Author: Unspecified
Review: Stern Magazine, May 15, 1996
Title: Chemical Messengers of Love 

. Authors: Several People
Source: Pheromone research Information, Web Page
Title: Pheromone Research Information: Human Studies

. Author: Anja Rikowski
Source Proc Biol Sci. 1999 May 7;266(1422):869-74
Title: Human Body Odour, Symmetry, and Attractiveness – Abstract

.Author: Jason Bernstein
Source: Web Page
Title: Sixth Sense: The Vomeronasal Organ 

. A Author: Anne Bruce
Source: Microscopy Web Page
Title: Chemicals that cause excitement 

. Author: F. Bryant Furlow
Source: Psychology Today, Mar/Apr 96
Title: The Smell of Love

. Author: PT Staff
Review: Psychology Today, Sep/Oct 2004
Title: Cupid’s Comeuppance

. Author: Erica M. Leggette
Review: Web Article
Title: The Role of Male Pheromones in Attraction

. Author: Unspecified
Source: Web Page
Title: Pheromones: Olfaction and memory 

. Author: James Vaughn Kohl
Source: Abstract Illustrated at the “International Society for Human Ethology”, Fourteenth Biennial Conference, Simon Fraser University, Burnaby, British Columbia, Canada, 1998, aug 19-23
Title: Human pheromones and the neuroendocrinology of behavior

. Author: James Vaughn Kohl
Review: Advances in Human Behavior and Evolution (1996)
Title: A Human Pheromones: Mammalian Olfactory, Genetic, Neuronal, Hormonal, and Behavioral Reciprocity and Human Sexuality

. Author: unspecified
Source: Web Page
Title: Chemical Effects on Interpersonal Relations: simulating “The Urge To Love”

. Author: Danielle Marck
Review: Biology 202, 2006 First Web Paper
Title: Finding the Perfect Mate: Male Pheromones and Female Attraction

. Authors: Ackerl K, Atzmueller M, Grammer K.
Review: Neuroendocrinological Letters, 23.2 pp. 79-84
Title: The scent of fear