I was 16 when I learnd that the movie I see in a theater isn't always the only version to be seen. there was quite a bit of publicity abt a small film calld "Cry Tough." Linda Cristal has a love scene with John Saxon. in the movie I saw she was wearing a black slip. but there was a version with her topless which was releasd in Europe.
now we're used to seeing director's cuts & alternate endings & all manner of "extras." James Robert Parish informs me abt a website which tracks these various versions of films. here is an example.