This was deifinitely a pre-code movie.
When the handsome white guy is interested in Belinha, one of the whote girls says something like, "What do South American girls have the we don't south of the equator?"
It's obviously a sexual reference to their hot machines.
I caught that too but it was such a subtle double entendre I think it would have been allowed under the Hays code. Most people, especially children, which I assume were the biggest concern of the code, would not have thought anything of it.
By the way, the answer to that question can be found right in the movie. Look at the dance styles; the Brazilian people didn't want to see the Foxtrot because they considered it too tame. Their dances, like their people, are much more suggestive and passionate. To be done correctly, one has to know how to move the hips, among other things.
Woman, man! That's the way it should be Tarzan. [Tarzan and his mate]