You should write this softwareOr tell me if it already exists.
- Specialized modeling software There is software for full-body modeling, and it does a pretty good job of body shapes, but not specific body parts. (This includes Daz and Virt-A-Mate.) Also, they currently only export mesh files, and are frequently not clean meshes.
Modeling software specific to body parts which outputs consistently usable meshes or solid model files would go a long way. There are only so many variables to phalluses, vulvas etc- I think there's utility here beyond exporting an STL of a rotated curve.