Why do some parents like to add water to their kids' juice? Why dilute it?

So it’s not as sweet. I still do that to my ice tea to this day

Most juices cause constipation for kids so watering it down smooths it out.

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .