Why Do Female Cats Scream During Mating? It’s quite common for female cats to scream or act aggressively during or after mating. While this reaction can seem alarming, it’s a natural response tied to the mating process. The main reason behind this behavior lies in the anatomy of the male cat (tomcat). A tomcat’s penis is equipped with small barbed spines. These spines lie flat during insertion but scrape the walls of the female’s vagina as he withdraws, causing discomfort or pain. This sensation often leads the female to respond with aggression, such as vocalizing loudly, swatting, or even attacking the male. Why Does a Tomcat Have Barbed Spines? The barbs serve an important biological function. Female cats don’t ovulate automatically—instead, mating must trigger it. The pain from the barbs during intercourse stimulates the female’s body to begin the ovulation process. While the initial hormonal response is immediate, full ovulation typically begins more than 24 hours later.🤯