Penetration Tag

Don't you compare. 1girl may be also 1boy or multiple_boys or multiple depictions. Duo has no purpose aside from denoting two people :/

MagicalAsparagus said:

But people are hardly ever interested. It takes ages for someone to actually decide on something here on Danbooru.

I understand that's annoying. But a useless tag not getting removed because no one cares isn't as bad as a useful tag getting removed. Useless tags don't actively harm anything.