For all species of the cat family, mating is painful. It's not the biting that hurts the female, it's the male's penis, which is barbed with 100 tiny.
Penile spines of a domestic cat. Many mammalian species have developed keratinized penile spines along the glans and/or.
Every physical characteristic your cat has contributes to survival. The barbs on a male cat's penis are no exception. They help ensure that his genes are passed.