The tag alias #81816 cum_from_penis -> cum is pending approval.
Reason: The wiki page for cum_from_penis was in a pretty sorry state when I found it yesterday. I rewrote it, but I fear my rewrite has a similar problem, being that this tag does not distinguish itself enough from cum or cum_on_penis to warrant its place, and trying to write a page on it that is unique & fully correct would be highly difficult. (And even then most would use it to mean cum, cumshot, etc.) I do feel like it can be safely assumed that cum comes from a penis, and any exceptions can be handled with their own tags.