That is complete and utter BS. I'm a veteran of a broken marriage and numerous other relationships too. Excuses are the kind of things people who want to justify cheating will say. Lonely? Too bad. People probably should get out of their current relationship prior to screwing around with other people. There is literally no good excuse for cheating. Does it matter to me what these people do in their private lives? No, but it will surely matter to their significant other.