Cabaret - I remember being about 13 years old, and the Michael York character saying "Screw Maximilian." And Sally replying, "I do." And the Michael York character saying, "So do I." That may have been the first time I ever heard someone talking about gay sex.
I was in my 20s when I first saw
"Cabaret" back in the 70s. And like you, Clarissa, it was one of the first times I ever saw anything gay on the big screen. I love "Cabaret" and will always remember the truly unforgettable scene you mention. Do you remember the other scene where the three of them are drunkenly dancing together, and you first become aware that "something" is going on?
It's firmly etched into my psyche, right up there with the first ever, close-up, man-on-man, mouth-to-mouth kiss I ever saw at the cinema. I speak, of course, of the truly unforgettable kiss between Peter Finch and Murray Head in
"Sunday, Bloody Sunday" (also from the 70s), which also starred the brilliant Glenda Jackson, who romantically shared Murray Head with Peter Finch in the film.
I herewith formally add "Sunday, Bloody Sunday" to my list ("Cabaret" is already on it)