sniffIf you’re near the end of Week 2 of your cycle—when ovulation occurs—you won’t need pricey perfume to get a man to notice you. According to a recent study out of Florida State University, when guys get a whiff of your natural scent, they get an automatic boost in testosterone, which revs their desire! This makes perfect evolutionary sense, the researchers say: During ovulation, your body sends out signals to males through chemicals in your sweat telling them that you’re fertile.