Although strong cross-sensory interactions between visual, tactile and auditory modalities have already been shown, we know little about how chemosensory information a¡ects processing in other sensory modalities. We studied whether smelling gender-speci¢c odorous sex hormone-like steroids: 5-a-androgenst-16 -en-3-one (androgen) or oestra-1, 3, 5 (10),16 -tetraen-3-ol (estrogen) can bias face gender discrimination. We found that, as a result of inhalation of androgen, men perceive faces to be

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... e masculine as compared to when they are exposed to estrogen. Our results provide evidence for speci¢c cross-sensory e¡ects of the gender-speci¢c chemosensory cues on the categorization of visual face gender. -NeuroReport15:000^000