If anyone has any question on the topic of meshes in SL

"sticky vertises between the legs" is what happens when verts are skinned (weight painted) to the wrong bone. This almost always happens if you attempt to use Blender/Avastar and Bind to Armature automatically. When verts traverse over the Y-axis, meaning a vert doesn't share the same side as its intended bone, you need a human to decide how those are going to be skinned, manually done to be exact.

Complex meshes like long skirts, asymetric dresses, and very baggy outfits, will require a true test of rigging skills.