How many cats drink milk?

I have been told on a animal care course that milk has lactose in it and it curdles in the cats stomach and can cause discomfort, i never give my cats milk for this reason, i would buy cat milk in replacement..my cats drink water everyday.. milk days are treat days x

i would say many cats do drink milk and love it on a daily basis, i would say 50% of all cats in the whole world drink milk on a daily basis....