Who Does It More: Men or Women?

Recently I had read John Updike's story Separating and it was about this couple getting ready for a divorce and have to figure out how to tell the children. In the story it mentions that Richard walked past the house of a woman he wanted to marry. Even though they did not say it exactly say but after reading that line of the story I thought that he did have an affair with another woman. Back then it seemed normal for people to have other lovers. These days some view it as still normal and yet some people find it despicable and vulgar to have other relationships when you are married. Back then and now men who often have multiple partners were found cool to be buddies with as well as it was also seen that women who have multiple partners are found as tramps. If anyone asked me I think that a man with multiple partners is as despicable like everyone views women with multiple partners.