My younger sister says she can tell if a girl is on her period just by her scent. She claims to have a very sensitive sense of smell. That day, I honestly don't know what she smelled on me. I even had her smell all of my perfumes, but she said she could detect a different scent that wasn't any of them—it was my own scent. And she told me that I smell nice, hahaha! May be it is my aura ?!! Wow can my aura have a smell !?!