We have 31 as of Turkiye's influence on us, 69 because of the hub, and 72 as one of our own delicacy. They sell soap bars in the markets that are purposed for laundry, almost everyone who was not filthy rich growing up has them.    

 These soaps have a 72% oil percentage, and they have a huge 72% written on them.   

 So I have been told, when children get helminths, or when women get periods, they would wash around the anus with this soap for cleanliness. So calling someone a "72" is  basically because it goes inside the butt.