BUR #5658 has been approved by @evazion.
remove implication irrumatio -> oral
create implication irrumatio -> fellatio
create alias forced_fellatio -> irrumatio
create alias forced_blowjob -> irrumatio
create implication reverse_fellatio -> fellatio
Based on the discussion in topic #18603.
Note that we already have after fellatio and imminent fellatio, we don't make a distinction between the two there.
Can't really find where it was decided that irrumatio is not fellatio, only discussion I could find was topic #9785 where deepthroat's implication was removed. But if you tried to argue that forced blowjobs aren't blowjobs to anyone outside of danbooru you'll get laughed at, so...
Not sure if deepthroat should be reimplicated, given it could be used with dildos, but then again there's already several posts under deepthroat solo so I'd like input on this. I guess it coud be used with cucumbers etc, but then it becomes the question of whether it should be tagged deepthroat if it's not a blowjob.
We also have oral insertion but it's very few posts and a lot of them seem to be mistagged fellatio. And yet sexually_suggestive fellatio returns some posts too.
I should also point out that right now irrumatio fellatio has 1.1k out of 1.8k posts, so the distinction is already meaningless.
Updated