How much milk can a male cow give I know the answer just my 7 year old thought this be funny to list

No milk from male cows, sorry.

Male cows don't exist. Cows are only female, not male nor male and/or female. Cows, by proper definition, are mature female bovines that have had at least one (or two) calves. The male counterpart of a cow (or opposite a cow, in your son's case) is called a bull. Bulls do not make milk, they make semen to mate to cows with in order for a cow to produce a calf.