Canon 60D, Canon 100-400L, 220mm, 1/1000, f8, ISO 1000
Having located a female in oestrous, the mature bull giraffe (Giraffa camelpardalis) situated behind the two females is way more interested in displaying his sexual intentions by gently rubbing and necking than he is in drinking!
Grooming a female for mating can be a rather extended affair and involves the male not letting her far out of his reach with lots of rubbing and nuzzling to tempt and seduce her.
This amorous old guy definitely had his work cut out for him as it took well into the next day before the female was willing to finally surrender to his advances.
Hwange National Park, Zimbabwe