Got Sperm?

Welcome to the world of online sperm donation, where moms uninterested in sperm banks meet donors online. Here, Lisa Ling meets exceptionally-prolific donor Ari Nagel, father to more than 117 children, and seeks answers to questions posed by media, scientists, and strangers alike – what would motivate someone to do this? Is it even ethical? Who are the mothers that seek him out, and how will the kids turn out?