Abortion is only half of the story. The Pill effectively changed pregnancy from something that was a problem (in most cases) for a Couple, to something that is now almost exclusively the woman/mother's problem. The Sperm Donor is only relevant when the girl makes the unpopular choice to have the baby, when he becomes a source of funding for the next couple decades. Consider how bizarre the expression "Shotgun Wedding" seems today. Now, the father of a knocked-up teenager blames his daughter for not "taking precautions."