If only the man wants the child, then only the man parents the child, the man has to take care of it and pay its expenses and if the woman doesn't want to do that, then she doesn't. If the man abuses the child, then it goes to a good adoptive family.

Also, if only the woman wants the child, then only the woman parents the child, the woman has to take care of it, and pay its expenses and if the man doesn't want to do that, then he doesn't. If the woman abuses the child, it goes to a good adoptive family.

This way, nobody is responsible for something that they had no choice in.