Yes. Many people sit a lot and the buttocks bear much of the body weight. A lot of wastes and toxins are accumulated there. The Urinary Bladder Meridian (one of the biggest detoxification channels in the body), Gall Bladder Meridian and other important meridians go through the buttocks. Meridian blockages at this region can lead to obesity, diabetes, hypertension, heart disease, lower back pain, prostate disorders, gynecological disorders, stomach, intestine and reproductive problems, etc. When you slap on the hips, much toxic waste can be expelled in the form of colorful Sha.