The word "need" is a bit off. Need always assumes that if you don't have or get it, you're not likely to survive or at least stay healthy and nourished. Sex is good for the body. It feels good and has other physical, emotional, and even spiritual benefits. But it's not a "need". Both men and women desire sex to various degrees. Whether men desire it or have a higher instinct to satisfy that release more seems to be the real question.
Sex drive is a desire or instinct to copulate with others for many different reasons, including affection, while a need is something that requires that we an obligation to satisfy it in order to live. By suggesting sex is a need, this implies it's someone's responsibility to satisfy it, and assumes this need if not filled will make someone go bonkers. So, no, sex is not a need, but an instinctual desire to be with someone we are attracted to and like. It maybe a stronger desire in some than others, such as that need for release (which women have as well) vs. a need for sex, but saying it's a need implies they men can't live or survive without it.
They may not want to survive without it, but doesn't mean they can't. This concept of need almost makes men sound like cave men or animals who can't control their sex drive and must give in to it for their own health. And that's ridiculous.