The pinch and rub technique is when a man has an itch on his scrotum. You cannot just itch it normally because it just moves the extra skin around. To preform the pinch and rub technique, you must take your index finger and thumb, and pinch the extra skin where it itches. Then proceed to rub the two fingers, creating friction in your scrotum. Which relieves your itch. However it may cause a boner.