Some sex toys, such as the Wartenberg Pinwheel, have rather cryptic names. Butt plugs, however, do exactly what you’d imagine: They plug up your butt. A butt plug’s main duty is to make you feel good,The anus can be a remarkable source of pleasure, so butt plugs, with a lot of lube, are a great way to loosen up the anus and get something inside of it.