i had this happen to me on 3 different occasions....all with black women.
most recent one...i would go to her spot...she'd be smelling immaculate cuz she'd just gotten out of the shower. Skin is glowing, hair is smelling wonderful, body looking smooth and scrumptious....so i ofcourse dive in.
We makin out heavy, suckin on em thangs and i slip a finger down there to do the test....and brehs
i'm like

how can a girl that just came out the shower have a p*ssy smelling like fish?
and funny thing is, i subtly put my finger near her nose so she can get the hint...but everytime i go back, the smell doesn't go away.
now i'm conflicted....cuz i still wanna keep fukkin...but that p*ssy smell though...