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Bats, Brains & Balls

from an article in the USA Today paper, Jan 26, 2006

Trade-off for bats: Breeding vs. Brains

For some male bats, sexual prowess comes with a small price: smaller brains. Researchers, led by Syracuse University biologist Scott Pitnick found that in bat species in which females have a large number of mates, males with the largest testicles have the smallest brains. In bat species where females are more monogamous, males with smaller testes have larger brains. The study in the online journal Proceedings of the Royal Society of Biological Science offers evidence that males in some species make an evolutionary trade-off between intelligence and sexual ability, says David Hoskens of the University of Exeter, England. "There are no free lunches," he says.

Above excerpt @Copyright 2006 USA Today

The Moral of the Story
"God gave men a brain and balls, but not enough blood for both."
         
 - An old joke