How to know if he's lying to you about cheating

You’ve got a feeling your significant other is up to no good. But even if your intuition is right, changes are he’s not going to answer your prompts with, “Yes, dear, I am cheating on you.” So short of hooking him up to a lie-detector test or sticking him with truth serum, how can you know if he’s lying to you? “tells” he’s lying through his teeth. Lie-detector tests are all about measuring changes from the norm, be that in terms of heart rate, breathing, or blood pressure. Likewise, when you’re investigating your guy’s possible misdeeds, any changes from his normal behavior point to dishonesty, if you ask where he was Friday night and he suddenly starts scratching his nose, clearing his throat, and breathing heavily, Guys know that looking down is a telltale sign of lying. So when they lie, they typically make a point to look you in the eye, Problem/good thing is, they typically overcompensate and go too far the other way. If he creepily stares you down (no blinking!) when he tells you, “No, I haven’t slept with anyone else,” he might as well be staring at his shoes, says Glass. You: “Are you cheating on me?” Him: “Am I cheating on you?... of course not!” Answering your question with a question buys him time to think of something believable to respond with, He might be doing it consciously or unconsciously, but either way, what he says next is probably going to be a lie.