How about head morphs that have built in ear modifications. I think Anubis and lycan are examples.
I realize this is a very old post, but since this thread has been disinterred I thought I might mention how I got round this problem with a recent character “Dokk Alfar” by Raw Art. This has a full body morph only, so you cannot reverse any individual part (e.g. head, ears). But I wanted to add a long hair without it poking out weirdly around the ears.
This won’t work with everything, but it worked quite well with this. I dialled in an elf ear from the G2 morph bundle (Ears Elf, or Ears Elf Long) and reversed it (set it to a negative %) to see if it would also reverse the baked-in elf ear from Dokk Alfar—at least enough to be invisible in the hair, which it did. I think these ears don’t have auto-follow on by default, so you will need to turn this on first, as well as turning limits off to allow negative values.
But since I wanted the ears to poke through the hair, I only wanted the reversal in the hair itself, not on Genesis. As setting a value for a morph in Genesis spawns it in the wearable asset (e.g hair) I could unreverse the Ears Elf morph in Genesis, then go to the hair and reverse the Ears Elf morph in the hair only.
A little hard to explain clearly, but hopefully you get the gist of it. The result is shown in this post.