https://e621.net/post/show/756846/2015-anthro-balls-breasts-butt-canine-chelsea_cham

The purpose of this tag is to be more specific for butt to butt only images where it is implied or directly stated that the action of knotting has caused two partners to become physically stuck together.
This would only apply to any images where it can be easily assumed that two partners are stuck "knotted" for an extended period of time. It seems to be the norm that in furry art knotting does not imply "tieing the knot" and has no effect on sex beyond stretching the vag/anus a little bit. Implies tags "knot" and "knotting" but is not implied by either. Search "knotting" and to just a fraction of the posts would tied_knot apply. Also does not apply to extended penetration, it has to be clear that the knot is what is keeping a couple physically together.
I have edited this tag into a few posts but there is a limit to what I can do myself.

uhhhhhh for future reference, ask from forums BEFORE starting to use a new tag. you know in case admins decide that the tag is useless or that there is better alternative.

anyways i think that the tag itself is really misleading and bad because it sounds a lot more like tied knot as in the thing you can do with ropes.

knotting ass_to_ass

parasprite said:
knotting ass_to_ass

ass_to_ass

https://youtu.be/gawughIGjK0?t=32s

Don't mind me, I'm just doing what I do best: Not actually adding anything to the conversation and linking to videos that pop up in my mind. Like this one, for instance:

https://www.youtube.com/watch?v=-C7HvJq03mk

In the biz, we call it "funposting", but most know it as "shitposting".