Interacial Relationship.....?

So I am posting this for a girlfriend of mine. ok So she is 21. white. She has been talking with this black man, they are friends. but they are slowing becoming more then friends. they met on Facebook and became friends, then it turns out the going to the same college. How can she tell her parents(who are old fashioned and very"southern" thinking minded indivduals) that she is interested in seeing a black gentlemen