Southern Giraffe: A younger male 'necking' an older male. [Hwange NP, Zimbabwe]. I do not believe that this is sexual behavior. I have seen this several times, and every time it is between two males -- a younger and older male. I believe that it is a gesture by the younger male to ingratiate himself with, or pay homage to, the older member of his group. The younger one is always the more active, i.e., he initiates more of the characteristic gestures of wrapping his neck around the body or neck of the elder animal, and he makes more effort in bending it than the older one does. [Hwange NP, Zimbabwe].