Intelligent men have better sperm
Men who are more intelligent tend to produce better quality sperm, research suggests.
Those with a big IQ were found to produce more sperm than your average knuckle dragger and their little guys were also said to be more mobile.
Experts say that the findings suggest the genes underlying intelligence may also have other biological effects.
The researchers from the Institute of Psychiatry made their discovery after looking at the intelligence test results of Vietnam war era soldiers and comparing it with 'other data.'
Lead researcher Dr Rosalind Arden said: "We took two characteristics that seemed unlikely to be associated with each other – intelligence and sperm quality.
"We found a small positive relationship: brighter men had better sperm. This association wasn't caused by habits like avoiding smoking or drinking – the big hitters of health."
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