Leading with the Correct bit Everyone can pull their perineum (the group of muscles between the genitals and the anus), also known as the 'pelvic floor' upwards; you do it when you want to stop urinating in mid-flow. However, when you do that particular action in that way, you are leading with the perineum. The same applies with the abdomen; everyone can pull their stomach/abdomen in, e.g. to get into a tight pair of trousers, but again, you are leading with the muscles