Friday, February 03, 2006

Breeding & Brain Size in Males

A study found that in more monogamous species, the average male brain size was about 2.6 percent of body weight, while in promiscuous species, the average size dipped to 1.9 percent.

"where the females are promiscuous, the males boasting the largest testicles also had the smallest brains. Conversely, where the females were faithful, the males had smaller testes and larger brains."

The study was mainly with bats, but the article referenced other mammals being similar.

Hmmm..... us guys can't do two things at the same time.

Is this why lately my brain seems to be shrinking... I am not in a monogamous relationship by having a wife or girlfriend?

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