The investigators have investigated 350 people who have been doing this habit for at least 20 years of their life and they have a family history of prostatic cancer to check the effect of this procedure on the prevention of the cancer. The investigators have excluded 135 participants of them because they have not full-filled the criteria of inclusion. So 215 of them have been included and investigated using PSA and prostate ultrasound.
The seven sweeps is a recommended act performed by men after urinating in order to be confident that no urine is left in the urethra, and its not compulsory to perform. It is performed by the following way: after urinating, the anus is first purified if it has become impure; then, the middle finger of the left hand is slid three times from the anus up to the scrotum; then, the thumb is placed on the penis and the forefinger is placed under the penis, and the thumb and forefinger are pulled three times along the penis up to the point of circumcision; finally, the end of the penis is pressed three times.