Fullagar, R. (2003). Kiss me. Nature Australia, 27, 74-75.
Haselton, M. G. and Buss, D. M. (2001). The affective shift hypothesis: The functions of emotional changes following sexual intercourse. Personal Relationships, 8, 357-369.
Hatfield, E. & Walster, G. W. (1985). A new look at love: A revealing report on the most elusive of all emotions. London: University Press of America.
Hughes, S. M. & Harrison, M. A. (2007). Sex differences in romantic kissing among college students: An evolutionary perspective. Evolutionary Psychology 5, 612-631.
McCabe, M. P. & Collins, J. K. (1984). Measurement of depth of desired and experienced sexual involvement at different stages of dating. Journal of Sex Research, 20, 377-390.
McCann, A. & Bonci, L. (2001). Maintaining women's oral health. Dental Clinical North America, 45, 571-601.
Pause, B. M., Sojka, B., Krauel, K., Fehm-Wolfsdorf, G., and Ferstl, R. (1996). Olfactory information processing during the course of the menstrual cycle. Biological Psychology, 44, 31-54.
Rosenberg, M. (2002). The science of bad breath. Scientific American, 286, 72-78.