Well, actually I was refering to the bounce/jiggle side of things - sorry for that. That said, collisions does work, just not 'out of the box', really, since you need to write/find/get xml's for all relevant meshes, except the female body & vagina meshes. All the basic xml's needed are listed in defaultBBPs.xml. Open the file in a text editor and out-comment the unneeded UNP shape ref's. If using the max body, it should look like this:   <default-bbps >   <!--