While I tend to agree with you.<quoted text>
For one to say. That (one) race of women does not belong to (one) race of man is like saying that a lioness does not belong to a lion; but instead a lioness can be with an elephant. Or that an owl does not belong with another owl instead an owl can be with a duck. The known law of simular species enter acting are non existant.
We do see it in nature, although it's not very common.