Why are there books about how to love a black woman but not books on how to love a white woman?

I honestly don't know but I think that it;s a little racist if you ask me about it. I mean searously look around your self we'er not all that diffrent yeh we might have diffrent colors of skin but on the insinde we are all the same we all bleed red bood,we all have hearts, and brains,and other bodily organs. So what's the diffrence I don't see any.