I would imagine most time, especially with poser figures, use of custom or dialed body shapes will not fit any clothing without poke-through so you're going to get head shapes more often as that doesn't affect or give poke-through in clothing. I'm sure someone will say if you have a Poser version that puts morphs in clothing that would solve it, but the fact is not every one has those versions and the poke-through becomes a vendor support issue when someone can't use the figure with their content or if the shape has bad bends. But this has been an issue for years and some of the newer figures themselves don't have this issue. But then custom body shapes need to be done correctly, with the proper correctives so that they bend correctly in poses as well. Not every vendor has the tools to make proper custom body shapes, so you'll have to rely on descriptions and promos to find out who does that... but I guarantee that there's only one vendor for V4 that has done custom body shapes, and that shape needs custom fits for clothing to work properly.