as synonyms: Dorso-ventral embrace, Mounting embrace or Mount-embrace. Perhaps, Kortlandts Sham copulation. Plooijs MOU, de Waals Mount. Males and females mount. Mounting occurs, especially among adult males, during high social excitement such as reunion of rival males, in which each rival male mounts adult male or female, and both participants often scream or pant-scream. Usually bipedal with pelvic thrusts. Appears to function as self-reassurance, reassurance, recruitment of coalition partners, etc. In bonobos, mounting occurs in similar contexts such as appeasement and easing of tension, but posture differs, so that mounted individual usually stands quadrupedal. See video. mount in copulation Goodall Copulation mount: Male places both hands firmly on the females back or sides, during which he may open mouth kiss her. accompanied by intromission and thrusting movements of