Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
Wildcat
Compared to other members of the "Felinae", the wildcat is a small species, but is nonetheless larger than the housecat. The wildcat is similar in appearance to a striped tabby cat, but has relatively longer legs, a more robust build, and a greater cranial volume. The tail is long, and usually slightly exceeds one-half of the animal's body length. Its skull is more spherical in shape than that of the jungle and leopard cat. The ears are moderate in length, and broad at the base. The eyes are large, with vertical pupils, and yellowish-green irises. Its dentition is relatively smaller and weaker than the jungle cat's. The species size varies according to Bergmann's rule, with the largest specimens occurring in cool, northern areas of Europe (such as Scotland and Scandinavia) and of Middle Asia (such as Mongolia, Manchuria and Siberia). Males measure in body length, in tail length, and normally weigh . Females are slightly smaller, measuring in body length and in tail length, and weighing .
Both sexes possess pre-anal glands, which consist of moderately sized sweat and sebaceous glands around the anal opening. Large-sized sebaceous and scent glands extend along the full length of the tail on the dorsal side. Male wildcats have pre-anal pockets located on the tail, which are activated upon reaching sexual maturity. These pockets play a significant role in reproduction and territorial marking. The species has two thoracic and two abdominal teats. The wildcat has good night vision, having 20 to 100% higher retinal ganglion cell densities than the housecat. It may have colour vision as the densities of its cone receptors are more than 100% higher than in the housecat. Its sense of smell is acute, and it can detect meat at up to 200 metres. The wildcat's whiskers are white; they can reach 5 to 8 cm in length on the lips, and number 7 to 16 on each side. The eyelashes range from 5 to 6 cm in length, and can number 6 to 8 per side. Whiskers are also present on the inner surface of the wrist, and can measure 3 to 4 cm.