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Detective Column

This column is the English version of a column written in Japan.

Disclaimer
This column was originally written in Japanese and has been translated into English for your convenience. Please note that the legal information and references discussed here apply specifically to Japanese laws and regulations. If you require legal advice or information relevant to your own country, we recommend consulting a qualified professional who is knowledgeable about the laws in your area.

How to Spot Infidelity: Ways to Detect a Cheating Partner, for Both Men and Women

Worried your partner might be having an affair but not sure how to confront them? Infidelity is an enduring marital challenge, causing emotional distress when suspicions arise.

Here, we’ll explain how to detect cheating in both men and women. Check if any of these clues match your partner’s behavior.

How to Detect Infidelity in Men

First, let’s consider men. Generally speaking, men tend to be more straightforward, less adept at lying, and may let their guard down when hiding an affair. Use these traits to your advantage:

Ask About His Reason for Going Out

When you first suspect something, it’s often prompted by frequent outings. If his explanations are vague—“I’m meeting a friend,” “Just going out to eat”—note them down. After about a week, casually ask again. If his story changes (previously he said “golf” but now it’s “shopping”), it’s likely a lie.

Watch His Eye Movements During Conversation

Men often look away to avoid eye contact when inventing or covering up lies. So, when you ask, “What did you do that day?” pay attention to his gaze. To spot changes accurately, observe his usual way of speaking first. Then, when you raise a suspicious topic, any shift in his eye movements will be more apparent.

Touch His Phone and Check His Reaction

Cheaters usually keep their phone close at all times. If you casually try to handle his phone, does he overreact or become visibly anxious? Many men don’t bother changing contacts or setting unique passwords, so simply seeing you touch their phone can provoke a strong response. Note his behavior carefully.

Inspect His Car’s Interior

Men often use a car to meet their lovers. Since women in affairs typically ride in the man’s car, examining his vehicle may reveal clues. Look for signs like strands of a stranger’s hair, unfamiliar scents, or changed seat/reclining positions. Even small traces can indicate an affair.

How to Detect Infidelity in Women

Now, let’s explore ways to spot cheating in women. They often have sharp intuition and notice small details, so proceed cautiously:

Observe Her Eye Movements During Conversation

As with men, checking eye contact can reveal deception. However, women who lie may maintain steady eye contact to read your intentions. If she looks you straight in the eye more than usual, it might be a sign she’s hiding something. Compare with her normal conversational style to judge any shift.

Pay Attention to How She Handles Her Phone

Women anticipating suspicion often lock or rename contacts on their phones. They may change passcodes frequently, making it harder to check messages. Still, watch how often she checks her phone. A sudden surge in phone use might indicate secret communications.

See If She’s Buying New Underwear or Clothes

New relationships can lead to changes in appearance—new outfits, different hairstyle, updated makeup routine. In women’s cases, fresh lingerie or unfamiliar apparel might be intended for a lover. She might hide these items where you’re unlikely to look, so stay alert if you notice changes in her wardrobe or grooming habits.

Check for Emotional Ups and Downs

If she’s heavily invested in an affair, her mood may fluctuate drastically. She might appear suddenly happy after hearing from her lover, or depressed if the affair hits complications. If she’s more erratic or listless than usual, it could signal a secret relationship. While not true for every woman, watch for noticeable shifts in temperament.

Conclusion

We’ve outlined methods to identify cheating in both men and women. These aren’t universal, and individuals may behave differently. Pay attention to what’s “unusual” for your partner—familiarity with their normal habits is essential.

Remember, these tips merely indicate the possibility of infidelity. If you want conclusive evidence, consider hiring a detective or investigation agency. Professional assistance can yield stronger proof, which might be necessary if you need to confront your partner or address infidelity in legal or mediation settings.

Japanese Detective Column