photo but not in movie
This one http://www.kino.de/kinofilm/schoen-ist-die-jugendzeit/fotoshow/38627/7971#fotoshowDetail
It's similar to their scene in the cupboard at the cinema. Was it edited out or is it promotional?
That's a good question. I just watched it, and didn't see that scene. The pose is similar to the one at the theater, as you say. Here's another of the same image, smaller, but less cropped.
https://www.imdb.com/title/tt0113720/mediaviewer/rm2848560897?ref_=ttmi_mi_all_sf_17