image source: pixabay.com
A male giraffe can tell when a female is ready to mate by using his long neck to nudge her backside until she starts to urinate. When she does, he’ll take a taste of that urine and decide whether or not he likes it.
If he does, the male will then follow the female around and “neck” her until she gives in. Funnily enough, the same behavior can be found between two males, as well.