Last week’s essay from Matthew Lee Anderson and Andrew Walker about evangelicals and in vitro fertilization makes an argument worth discussing: God intends that sex and procreation should not be separated from each other. It made me think of the story of Donald Cline, the fertility doctor who (unknown to his patients) used his own sperm when inseminating his patients, eventually “fathering” at least 50 children. The Atlantic article about Donald Cline by Sarah Zhang on Cline is well-told, but…