This thread reminds me of conversations in the locker room after football games in highschool while some guys were just learning the ins and outs of sex.
Of course a fishy smell is natural. One of the oldest jokes around comes from medival times: Q. What does the blind beggar say when the fish monger's cart passes? A. "Gooday ladies"
I remember as a teenager, the odour would linger on my finger for days. Many a school boy would sit in class the next day smelling his finger(s) after a round behind the stadium with a girl.
These days with modern hygiene, most MPAs, SPs and dancers will douche several times before getting close to customers. Therefore, usually in this business, there is no odour detectable during DATY or kitty play.
Some of the E. European ladies who are not accustomed to N. American attitudes, do not practice the same level of hygiene - neither in the kitty or in the arm-pits, at least when they first arrive. However, they usually learn quickly and are devoid of natural odours within a few weeks of arriving.
Strong odour is not necessarily a sign that there is anything wrong with the lady. Each lady has her own unique odour. Some are like perfume and others like rotting tuna. Let your nose be your guide. If it smells bad, stay away. Some of these natural odours are actually rather a turn on.
In fact, those of us who grew up before such a high level of vaginal hygiene was the norm, actually miss a little of the special aroma now and then.
Cheers