“It’s an area that makes people uncomfortable. It’s about sex. It’s about men,” Dr. Swan said. “You can get a lot further if you have a nice finding on autism or obesity.” “There is a general feeling of ‘My God, there’s too many people in the world already, who cares?’” Dr. Swan said. “One of our answers to ‘who cares?’ is to point out men with low semen quality die earlier than other men. They have more cardiovascular disease, they have more diabetes, they have more cancer.” https://www.nytimes.com/2018/07/25/style/sperm-count.html