While searching for such a specific concept, I just noticed that we have no tags for "presenting another person" and we have no specific tags for "spreading another's *" like ass pussy etc.
I suggest creating a new presenting another tag for cases, where one person is presented by another person. While trying to find other ways to search for both concepts I had a really hard time. Searching for presenting -solo either gives you a lot of images, where a person is still presenting themselves to the viewer, or you get images that aren't correctly tagged as solo. In very few cases, you find images like post #6164410, post #6148807, post #6015181 or post #5459402. The only tag I found, that has some of the elements of such a new tag would be assisted exposure, but not all of those are presenting, as a lot of those images are accidental assisted exposure or just undressing another.
I also noticed, that we have no tags for images where one character spreads bodyparts of another character. For example searching for spread_ass -solo has images like post #6602267 but also post #6605907. Should we seperate the concept of spreading into "spreading own *" and "spreading another's *" like we already did with other tags, for examle the holding tags?