Is there more information on these other than wikipedia and the B&B wiki. I've always been curious what motivated someone to invent one? Who invented them? Are they a modification of a paintbrush or toothbrush? (Speaking of paint brushes did the Chinese invent all animal hair brushes or did the Romans and Greeks also invent them). If hard shaving soaps were only invented in 19th century why did shaving brushes predate them since most creams were probably able to be applied without a brush. Anybody have any info?