Anthro on Feral should NOT be an alias of Feral on Anthro

Look I get wanting to mitigate confusion, but if you wanna make a bloated mess of sex tags at least let this be separated too come on.
 
Feral On Anthro <=> Anthro On Feral
 
If you don’t know what to tag it on an image then just don’t tag it at all. Just let people be able to look for or filter one in particular. This is only two variations so it would not be a huge strain.

@LightningBolt  
I proposed those tags and this is as e621 definition states:  

 
But e621 also has feral penetrating, feral penetrated and anthro penetrating, anthro penetrated tags.

@CruFox  
Derpibooru has split tags for who’s on top in similar stuff. Not always used correctly but for one tag I see no issues.