Irritable male syndrome is a newly-recognized medical condition that turns confident, aggressive males into withdrawn, grumpy wimps. It?s caused by a sudden drop in testosterone, and affects men as well as animals, according to Gerald Lincoln of the Medical Research Council?s Human Reproductive Sciences Unit in Scotland.

The symptoms may resemble those of male menopause, but Lincoln believes the condition can affect men of any age when stress causes testosterone levels to suddenly fall.
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