Women take a longer time to become fully aroused than do men. A man can look at his naked partner and get fully aroused in seconds, while a woman might take five, ten, fifteen minutes or more of being kissed and caressed and touched and talked to in order to be ready to have intercourse. Those ministrations are what are known as foreplay. It is the love making that takes place before intercourse begins. Now some women can't have an orgasm from intercourse. They require direct stimulation of their clitoris, which they do not get from intercourse, in order to have an orgasm. They may actually have their orgasm before intercourse, during foreplay. Other women need foreplay to become sufficiently aroused so that they can have an orgasm during intercourse. Without foreplay, endless intercourse would not lead them to orgasm. But it doesn't really matter when a person has their orgasm, or even if they have an orgasm, as long as afterwards, both partners feel satisfied with the experience.