furrypickle said:
We do have the anatomically_correct set of tags for when the genitalia does match the species. And you can then exclude if you want more mixed genitalia results. Using or excluding that tag would probably get you closer results than -knot would.
Well the -knot was just a generic example. It's still pretty difficult to filter the whole concept out. f there's a horse with a horsecock and a bull with a horsecock, or a tiger and a dog both with knots, that would still have the anatomically_correct tag.