These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Les Yay: Two dancers insist they never dance in separate groups. Babs sneers she's had enough men. Of course, they all find the professor's assistants irresistable, so it could be a case of Girl on Girl Is Hot titilation.
The plane crash is shown with stock footage, with the girls screaming in front of a black background. Because that's how airplanes were in the 1960s, I guess.
In a decidedly more mundane case, the stripper gets slapped at some point. While they play the sound effects, it's not only incredibly obvious that no contact was made, but the stripper doesn't even physically react to being hit.