Why make two different figures?

This would be my solution:

1 figure, with poseble genitals. Add some extra poly loops around the genitals where the group connects to the hip.

Then do a fbm, reducing the gen size to microscopic, and move those up into the hip. Complete Tthe morph by snapping the edge points where the gen attaches to the hip, and then space those extra loops out, so you can make a nice smooth uv map without distortion there.

Turn the fbm ON, and save.

Now weld those point surrounding the gen attachement, so displacement maps can still be moved, and relax the uv map there.

save that new obj file.

On the non gen cr2, change the obj reference to the new hidden gen obj file.

Now you easily have 2 cr2 files, both with displacement ability, one with working gen, and one with it hidden, and adding to either cr2 is easy, because you just need to turn the fbm on, and change the obj reference. Developers then have a very easy way to hack the cr2 adding scaling or whatever, or adding morphs.

Way too many people take way too many things way too seriously.