Dictionary of Human Evolution and Biology

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Genital Display

Behavior in which the genitals are used to communicate. One form is presenting, in which females and subordinate males may turn their hindquarters towards a dominant animal to solicit copulation or as appeasement behavior. A second form is the male penile display. This threatening behavior is usually performed with an erect penis; in marmosets it is accompanied by urine marking; in some of the guenons, especially vervets, the display is visually enhanced by a bright red penis and bright blue scrotum.

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