We always hear about what men are lacking when there is a intimacy issue in a marriage. In every marriage I have known where men were dissatisfied with their sex life, the men were not putting very much energy into the relationship, period.
I ask disgruntled husbands this: If you went to a bar to get sex, how would you have to treat a woman to get her to want to go home with you? (or any other example of how you would go about getting a woman to want to have sex with you, just using a bar pickup as an example) Are you treating your wife like a woman you would like to go home with?
If you are upset because you are not getting enough sex and you are not putting more emotional effort into your marriage than simply going to work and coming home every night,(which many men think is all it really takes to be a great husband) you are guilty of cutting your nose off and calling it someone else's crime.
I definitely buy "I was not getting enough sex, she refused to work on/talk about the relationship and that is why I asked for a divorce"...but cheating is equals "She stopped being easy to get in bed, I didn't feel like dealing with the marriage so I took the lazy way by chasing someone else (or paying for sex)"