Don't cheat. Duh!
Make a vow, keep a vow. Duh!
However, for those who are considering an affair, and are stupid enough to listen to consequence-free sounding "advice" like one popular cheating website promotes, "Life is too short: Have an affair.", let me offer this counter-advice:
"Life is too short: Be a man/woman — Live with honor."
"Live is too short, and divorce is too costly and way too painful: So keep it in your pants and mend it, don't end it."
Here are 15 examples of those, who like all liars, think they are immune from getting caught... until they are: