Marc Chagall Artist at Easel painting

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They can often be overlooked in favour of their handsome counterparts.
But brainboxes should stop despairing because research shows they are more virile than other men.
Scientists have shown that bright men have better sperm.
They produce more of it and it is of higher quality, suggesting they are better-equipped to start a family than their intellectually inferior friends and colleagues.
Researchers from the made the link after comparing archived data on 425 Vietnam War veterans.
This dated back to 1985, when the men had given sperm samples as part of an extensive medical and undergone intelligence testing.
Comparing the two clearly showed that the brainiest men had the best quality sperm.
Total sperm count was higher, as well as sperm concentration and ability to swim, the journal Intelligence reports.
What is more, the finding could not be as smoking, drinking and obesity, said researcher Rosalind Arden.