Clever Men Produce Superior Sperm
The better men do on intelligence tests, the better their overall quality of sperm.
In 1985, the Center for Disease Control took sperm samples from Vietnam vets between the ages of 31 and 44, and then gave them a series of intelligence tests. Researchers from three universities recently analysed these results, and found that the higher the man scored in the tests, the more sperm per milliliter of semen he produced. His boys were also better swimmers.
