To sorta bounce off the above remark by Talulah assumes that the owner of the penises is a boy/is always a boy. This would miss situations of multiple futanari girls.
Same argument, just now that it would be multiple_girls + futanari, at most.
Then what we need is "surrounded by dicks" or a similarly-named tag, not this joke of a tag. Incidentally that's what this tag was used for originally before it was ruined by people with more pedantry than brain.
I agree to this, and on normal circumstances d I would have said to create alias for that and it's over, but as it is I think the tag cannot be salvaged, as now it looks like it covers all sexual content in which more than one penis is seen.