Everybody knows, deep down, that cheating on someone is wrong. Even the most heartless swinger can admit they're harming the relationship by straying, if they look deep enough into themselves. But that's the thing: a cheater will do whatever it takes to avoid looking into their feelings, because they know precisely that they're not going to like what they find.
Worst of all for a cheater is talking to their partner about it, or having to face questions from them, because then the lies only add to the guilt. "What's that?" she shouts over the timely clatter of washing up. "Just gotta go to the store," she says, cutting you off mid-sentence. "Not now, The Bachelor's on" - just as you are about to lay bare your heart. Sounds familiar? Time to start digging.