I know on pixiv there is a tag "no that's kefir" for images that appear to depict semen.
We used to have an "Ambiguous White Fluid" pool for images feature white fluid splashes that may or may not have been semen. The pool's gone now, which isn't unreasonable - the concept was clearly more suited for a tag - but if it was replaced by a tag, I can't figure out what it was.
We used to have an "Ambiguous White Fluid" pool for images feature white fluid splashes that may or may not have been semen. The pool's gone now, which isn't unreasonable - the concept was clearly more suited for a tag - but if it was replaced by a tag, I can't figure out what it was.