Believe it or not, estimates say one in 2.7 men will cheat on their wives at some point in the marriage and their wives will never know. This information from a M. Gary Neuman the author of “ The Truth About Cheating”. The number one warning sign of men cheating is he spends more time away from home. In a interview with Oprah, Neuman said 92% of the men say it isn't about sex, rather a sense of feeling under appreciated. The number one complaint from married men about their sex lives at home? The majority say it’s the frequency of sex.