The 'ideal' family image for Catholics has been a Father and Mother, often described in terms of Head and Heart. Both compliment each other and are models for their offspring's. That is, as God intended. Any deviation of that Divinely instituted model, be that natural or unnatural, brings about unforeseen consequences for the children. Adoption of a child is difficult enough for many adoptees as well as for the adopted child, Adding a deviation from the 'ideal' to the mix and we are setting up the adopted child for a life of emotional struggle that is exponentially way above the norm of its counterpart in an ordinary family.