In many individuals they don’t and this may be due to the increased use of one arm as a result of lateralization. Lateralization refers to the localization of function attributed to either the right or left side of the brain.
Ferdenzi C, Schaal B and Roberts SC1 took this matter further by testing whether odor samples from the right and left axillae provided by right- and left-handed men were perceived differently by female raters.
Participants were 38 males and 49 females, aged 19-35 years. The female raters were selected from those who did not take hormone-based contraception and were estimated to be in the fertile phase of their menstrual cycle.
Fresh odor samples (cotton pads worn underarm for 24 h) were evaluated for attractiveness, intensity, and masculinity, with left and right samples being presented as independent stimuli.
It was found that in left-handers the odour from the axilla corresponding to the dominant side (left) was rated more masculine and more intense than the other side (right). No difference was noticed in right-handers.
1. Ferdenzi C, Schaal B, Roberts SC. Human axillary odor: are there side-related perceptual differences? Chem Senses. 2009 Sep;34(7):565-71.
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