area of Pan troglodytes vellerosus in Ebo Forest, Cameroon. Research organized by B.J. Morgan and E.E. Abwe from 2005 to present. ejaculate Ejection of seminal fluid from penis. Males begin to ejaculate at 9 years old at Mahale. Semen often eaten by both sexes. See eat semen. See video. elbow clamp See clamp elbow. emasculate 71 emasculate Remove testicles, occasionally in extreme male-male competition. Evidence from Kanyawara and Ta, as well as from captivity. Some male bonobos of Wamba lack testicles but cause unknown. 3. embrace full Goodall Ventro-ventral embrace: Two individuals face each other and each puts one or both arms around the other. van Hooffs Embrace, Plooijs Embrace full. Contexts include greeting, reassurance, alliance, and reconciliation. Embrace full by adult males may be accompanied by thrust.