Vegan philosophy, moral and ethics. Befriend an animal and learn its uniqueness, it's individuality. It is a blatant statement of nonviolence and compassion toward other sentient beings. Milk is produced naturally by all mammal mothers after giving birth to their offspring.
Cows are no exception.
Under conditions outside of human intervention, a mammals milk will be destined for its offspring. While all around him, there are stars in the water, where the raindrops fall.