Turnabout's fair play, Rederick! Blythe puts on a show for you, you ought to give her a show, too!
Nervous Red here is likewise sporting a brand new custom shader network, complete with brand new texture maps! Here he has the classic shader nodes, though. To further demonstrate the easy of adding new layers (and thus features) Rederick acquiesced to Blythe's request and donned a thong. Looks like he didn't think she'd be snapping some pics, though!
The thong itself is another simple, black and white texture map, piped in as the weight value to another Layer on the new custom shader networks' MILA node backbone. A metallic (or maybe car paint) node provides the coloring, so it's easy to alter on a whim. If I wanted more complexity, I could easily add more layer or replace the shader with a texture that has the look I want, or even a combination of those! It takes very little time to setup, make an hour at most if you include all the playing around with it.