Lots of factors can affect smell and taste, including: diet, vitamin deficiencies, medication, her cycle (some women produce vaginal secretions that contain compounds called aliphatic acid chains, and may cause her scent to vary with the phase of her menstrual cycle), infection, hydration, alcohol, drugs, tobacco. Unprotected sex can also affect a woman’s smell, in that sperm is highly alkaline and raises the pH level of the vaginal ecosystem.
