OK, I’ve heard of people necking but watching giraffes necking was a whole new experience. While visiting Augrabies Falls National Park in northwestern South Africa we took a little game drive and were fortunate enough to see giraffes necking.
This activity often involves males establishing dominance by winning a bout of necking. Not usually of high intensity they rub and lean against each other sometimes for more than half an hour. After a duel, it is common for them to caress and court each other leading up to mounting and climax. Sometimes they get violent and injury follows.
This looks more like a dance to me.