Regarding cat sex:
At first, the female will reject the male, but eventually the female will allow the male to mate. The female will utter a loud yowl as the male pulls out of her. This is because a male cats penis has a band of about 120–150 backwards-pointing spines, which are about one millimeter long; upon withdrawal of the penis, the spines rake the walls of the females vagina, which is a trigger for ovulation. This act also occurs to clear the vagina of other sperm in the context of a second or more mating, thus giving the later males a larger chance of conception.
The male cats don’t just get some action. They rake the female clean of any other guys.