The tag alias #64120 snake_impalement -> threaded_by_body is pending approval.

Reason: snake impalement as a bit of a misnomer, as threading / all the way through and impalement are different, though similar things (the impalement wiki page has a 'not to be confused with' for snake impalement). This isn't really any different from threaded by body, and if someone specifically wants a snake doing the threading they can simply use 'threaded_by_body snake'. There are only a few snake impalement posts that aren't tagged with threaded by body, and those are tagged with threaded by tail (the line between tail and body in a snake is rather nebulous).

EDIT: I see that a transitive is making it so that threaded by body would imply snake, do I need to redo this as a BUR?

The transitive is fine, since that's from a pending implication that shouldn't be approved: topic #39177 (snake_impalement isn't just for snakes, the threaded_by_body wiki is incorrect in that respect).
The only potential issue I see is that snake_impalement is specifically for mouth and anus, while threaded_by_body can be any two holes. An implication might be better, if we're keeping it instead, but it would still need a rename. That said, I think very little value would be lost, given the oddities of that tag family.

If we were to change the name maybe something like vore_through?

Bringing this back, the problem SCTH brought up isn't really relevant, you could just search threaded_by_body ~oral_threading ~anal_threading.

Here's what a wrote up when I was trying to do this alias again before realizing this one was still active :P

These are synonyms.

snake_impalement: A specific variant of full tour where the "prey" can be seen coming out of both ends (i.e: both the mouth and anus) of the "predator" simultaneously. Since the digestive system is generally assumed to be fairly lengthy and tortuous, most examples of this tend to involve snakes, though that is not a requirement.

threaded_by_body: When a character is being penetrated all the way through by another character's body. For the common case where the penetrating character is a snake, see snake_impalement.

The snake_impalement wiki doesn't even agree with the more specific use the threaded_by_body one gives it (and there are several posts tagged snake_impalement that do not involve a snake. Even if the distinction did exist it wouldn't be very useful anyway, as one can just search threaded_by_body snake if that's what they want to see.

pleaseletmein said:
Bringing this back, the problem SCTH brought up isn't really relevant, you could just search threaded_by_body ~oral_threading ~anal_threading.

Here's what a wrote up when I was trying to do this alias again before realizing this one was still active :P

Yeah, I'm aware of the confusion around these. I wrote the current definition for snake_impalement to try and cover non-snake cases 5 years before I made the threaded_by subtags, and I wasn't sure of what role snake_impalement was going to play afterwards, so I figured I'd just leave it as it is and see how it would turn out.

The wiki for snaked mentions snake_impalement as being kind of a supplement to both tags by saying "Depending on which end is being inserted and how much of the snake is in, this may or may not count as [...] snake impalement (either threaded by body or threaded by tail)."

I'm personally on the fence. I do agree that the tag has gotten redundant, but I've grown attached to it over the years, even if it also works counter to the threading/impalement split we've got going on.