What is the stem of male milk?

A: Male milk should be the brand of pure milk.

In the impression of most people, the word "cow" refers to the kind of cow that is specially raised to produce milk and has black and white flowers on its body, which is defined from its appearance characteristics; In the eyes of others, cows that can produce milk and be used for production and sales are called "cows", whether they have black and white flowers or not, which is defined from the perspective of economics. This difference leads to "Do male cows produce milk?" .