In humans, the visible portion - the glans - is at the front junction of the labia minora inner lips , above the opening of the urethra. Unlike the penis , the male homologue equivalent to the clitoris, it usually does not contain the distal portion or opening of the urethra and is therefore not used for urination. The clitoris also usually lacks a reproductive function. While few animals urinate through the clitoris or use it reproductively, the spotted hyena , which has an especially large clitoris, urinates, mates, and gives birth via the organ. Some other mammals, such as lemurs and spider monkeys , also have a large clitoris. The clitoris is the human female's most sensitive erogenous zone and generally the primary anatomical source of human female sexual pleasure.
10 Worst Adaptations in the Animal Kingdom
Female Hyenas Have an 8-Inch Clitoris--And It Makes For Tricky Mating — Sex And Psychology
Hyenas appeared 25 million years ago from ancestors related to the civet cats. Even if the size of civet cats, those early hyenas already had molars for breaking bones. Cave hyena, that inhabited Europe during the Ice Age, was twice the size of the modern spotted hyenas. Spotted hyena is the largest living hyena. It lives from deserts to woodlands in Africa, South of Sahara, except the southernmost areas and Congo basin. The coat has dark spots, and the neck and shoulders present a short and coarse mane. This hyena has rounded ears, the others have pointed ones.
The Painful Realities of Hyena Sex
So this probably isn't one we're as familiar with as, say, our appendix or the panda's insatiable appetite for foods that aren't really that good for them. But the hyena's sexual organs should get their due for just how cruel an adaptation can be. First off, the female hyena has an enlarged clitoris that's difficult to distinguish from the penis of the male.
The female spotted hyena runs things in the cackle. Males are submissive, cautious, and fearful. The female has no external vagina. She urinates and mates through her penis-like shaft—which, by the way, is capable of an erection. Naturally, mating with two penises is difficult.