When a heterosexual couple become parents through assisted conception involving sperm donation it is the father who will raise the child rather than the father who contributed the sperm who has his name on the birth certificate. Why?

Clearly the birth certificate reflects a social rather than a biological truth. It was ever thus. The guesstimated level of discrepancy between the social and biological paternity within families is almost alarming, and certainly surprisingly high. That's not taking account all the 'blended' families that exist, and always have.

Back to the cloisters boys, and keep your noses out of other people's lives.