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.
Felis
The genus includes the domestic cat. The smallest "Felis" species is the black-footed cat with a head and body length from . The largest is the jungle cat with a head and body length from . 
"Felis" species inhabit a wide range of different habitats, from swampland to desert, and generally hunt small rodents, birds and other small animals, depending on their local environment. The worldwide introduction of the domestic cat also made it common to urban landscapes around the globe.