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.
Values Dissonance: The Girl mentions that she posed for an "artistic" picture (called Textures) in an issue of the photo anthology U.S. Camera. Richard has a copy of this issue on his bookshelf, so he pulls it out and he and The Girl peruse it. We are not permitted to see the photograph in question at first, and the context of the film (especially Richard's mentioning that there must have been a large, gawking crowd) implies that the photo probably shows The Girl nude. But then Richard shows off the photo again - this time to one of his clients at work - and Billy Wilder finally permits the audience to see it as well. It shows The Girl wearing a bikini. (In the mid-1950s, the bikini, which was a French invention, was banned in some parts of the United States, particularly in the Northeast.)
Watch It for the Meme: Subverted, if you can believe it. A lot of people probably watch this movie to see the famous scene of Marilyn Monroe standing over the subway grate, but here's the thing... it's not in the film. A *version* of it can be seen, but it was re-shot on a soundstage (as opposed to on location, which is where the famous photographs come from) and edited so that her skirt is never seen above her waist.