William Saletan highlights an interesting study in reproductive biology.
In a paper presented to the European Society of Human Reproduction and Embryology, Dr. David Greening, an Australian infertility expert, reports that 81 percent of the men in his study significantly improved their sperm quality, as measured by DNA fragmentation, through a simple one-week program.
The program was so easy that even the average guy could follow it. According to a summary of the study, "The men were instructed to ejaculate daily."
He presents it as a conflict for religious organizations like the Catholic church, which frown on masturbation. Unfortunately, Saletan gets it wrong. The Catholic Church can still condemn masturbation as sinful and urge their followers to procreate madly because there's nothing in their doctrine to favor quality reproduction. To the simple-minded, human beings are all r-selected. Pop 'em out and let God sort 'em out should be their motto.