If your significant other suddenly starts exercising and eating healthier, that could be a sign that they are trying to appear more attractive to someone (possibly you, but possibly an affair partner). If Mr. Sweatpants-Are-Just-Fine-at-a-Party starts wearing slacks with matching socks and a fashionable shirt, or Ms. I-Can’t-Help-It-If-I-Smell-Like-Our-Son’s-Poopy-Diapers suddenly smells like Chanel No. 5, that may indicate an affair. Ditto for a new haircut and new underwear — especially if your significant other looks the same around you, but significantly better for work or certain social events.
