Here is the video I promised about face to face copulation in western gorillas.
Kingo is on the left side of the screen, while on the right side are Emilie and Ekendi (Mekome son). Kingo is vocalizing asking for copulation while Emilie is slowly getting closer to him, up to the point she embraces him and the copulation starts. You can see her hands on Kingo shoulder and her feet on Kingo legs! The little Ekendi runs in the middle, between Kingo and Emilie, and climbs on Emilie chest and face! Annoyed by Ekendi, the copulation ends with Kingo biting softly Ekendi (unfortunately this part was not recorded). We apologize for the low quality of the video and our inexperience as camerawomen, hoping you will enjoy it anyway!
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