Today I've stumbled upon the top_hole tag, according to the wiki it's for "When a penetrating character's anus is clearly visible and part of the focus"
It seems to have been started by one user then been carried on by a few more, it hasn't really seen widespread use
Do we need this tag? I can theoretically see the concept of the tag being worth tagging, but if we do keep it, it definitely needs a name
Its current name is obscure and the terms on both sides are not terms we regularly use because of ambiguity