That fishy smell is old cum still hanging on inside the vagina. Women on birth control pills have rotten vaginas from all the men just raw dogging and blowing the cock snot inside. Women who insist on men wearing condoms will have a neutral smelling vagina, with no odor beyond a whiff of wet pennies. Don't believe me? Ejaculate several times into a ziplock bag and leave it in a warm place for a week. It will absolutely smell like a rotten fish vagina.