The "fantasy" of intimate relationships with aliens has already been expressed by a small section of American society. Therefore, I believe in the future when alien life forms make their presence known, there will be multiple instances of human/alien relationships. Some also do believe that aliens have already made contact with humankind, and these types of relationships have long been occurring.
It would be selfish to believe that we are the only life forms in the vast space we call the universe. Eventually we will be able to make contact and share information. At one time the black and Jewish race were considered less than human, but we have made peace with equality in all men and this could be true with those from other planets.