I'd like to see where you got your statistics from, and what process they used in gathering the data. Maybe men just don't admit to it in surveys. Or if it's after-they-were-caught data, maybe women aren't as secretive or discrete about affairs.

Let's just put it at:
Men lie, women lie, everybody lies! Men cheat, women cheat, lots of people cheat. We can't really say oh women do it more, because its each relationship is its own case. If you marry a cheater but you're the most perfect person for them, I'd doubt they'd cheat. People argue that certain genders are more inclined to cheat, however I believe that it's more of the individual. Certain personality types are more inclined to cheat. Certain personality types are more inclined to lie.