If you think back in history, I believe that we've made a lot of progress in terms of racism.
Nowadays black and white couples are widely accepted, unfortunately, they still suffer from racism and stereotypes from society.
Oddly enough, these stereotypes are not solely encountered in unknown territory but family, friends and coworkers can make hurtful comments out of ignorance.
In some communities, family members might feel rejected and take it very personally if you date a person "outside of your race". They may think that they are not good enough for you or that you are ashamed of your ethnicity. On the other hand, if you are the white partner, you may be confronted with a lot of stereotypes and a lot of questions related to fetishism or a passion for exoticism.
This is deeply rooted in history and it is a sad way to think. Despite the evolution of society, there is still a lot of room for improvement. People should be able to date, love and court whoever they want regardless of their race. Geographic situation, and communities do make a difference though - without generalizing, multicultural cities are more likely to be accepting of you as a couple than a small community.
In fact, racism often comes as snarky remarks from ignorant people who are behind their time.
It is very important to discuss this topic with your partner - if you are white, you may have never been subjected to racism and therefore, you may not be aware of it. If you are the black partner, you may feel misunderstood or you may need support. As a couple, you must stand up for each other and put people in their place.
When comes the time to raise a family of interracial dating, you will notice that people will be all over the new baby. For some reasons, mixed babies are typically well accepted because they are cute but it also comes with challenges.
Inevitably, your child will start questioning whether he belongs to the white or black community, and wonder why he is different from his friends who might ask questions such as "why is your Mommy white?" or "why is your hair so curly" etc.
You can't prevent children to wonder about these things but you can prepare your child and teach him to be proud and confident in who he is.
At the end of the day, it shouldn't be that big of a deal. I think most people are curious or scared about things they aren't accustomed to. Black and white couples are just couples.