I'm not sure if this will work with the highly talented KouLeifoh's High Poly Conversion.
I gathered these files from various sources LL and nexus but I edited them a bit using the Havok modifier that comes as a separate download for HDT physics.
What the attached file contains:
XML files + Changed Meshes --> These aren't really needed to work but they are supposedly better attached to the XML files.... (so feel free to overwrite these with SAM BBB and XPMSE)
So to make these files work you'll need:
SKSE
SAM
SAM HDT BBB
XPMSE
Use add item menu to add to your inventory or the chosen bottom's inventory the "HDT bottom or Havok bottom" item.
These Havok objects take up slot 48 but it can be changed and the effects will still run
What I'm hoping is that Mr.KLeifoh and others would take this over and see if they can modify the XML files to bet better compatible and achieve the belly node distension that is present for females.
So how does this do what it does: Well it makes the collision appear by changing he havok XML that acts on the body in this case it's the male body using the physics made for females.
It is a very sensitive setting!
SAM HDT Collision.7z