There Are No Flies on Him! 9 Ways Guys Find out Their Girlfriends Are Cheating

3. Her clothes smell of cigarettes, but she doesn’t smoke


“I have a great sense of smell, so I realized straight away.” In some cases, a suspicious smell caused guys to experience doubts. Saying something like, “I was out drinking with friends” could cover up for the smell of cigarette smoke, but the more you lie, the deeper you dig yourself in.