Estrogen Makes Males Aggressive

And I'm not talking about men in the presence of scantily clad women, either. No, in this case, male mice are more aggressive with more estrogen during the winter months. Conversely, estrogen makes the mice less aggressive during the summer months. Hmmm....

"We found that estrogen has totally opposite effects on behavior in these mice, depending only on how much light they got each day. It was quite a surprising finding," study co-author Brian Trainor, a postdoctoral fellow in psychology and neuroscience, said in a prepared statement.

The study is one of only a few that have shown how hormones other than testosterone influence aggression in mammals.

"This goes against the common belief that testosterone is the hormone that regulates aggression. There are now several studies showing that, in some species, estrogen plays a key role in aggressiveness as well," study co-author Randy Nelson, a professor of psychology and neuroscience, said in a prepared statement.

I love that word belief. It's so accurate. Science and medicine is a hallowed hall of beliefs. It is it's own religion, with it's own tenets.

Could it be that human physiology is just a wee bit more complicated than the official feminist dogma: testosterone make vicious sexually predatory killers? Nah..... Let's keep science simple. Let's pretend that testosterone is evil. It's more fun and serves a nice political purpose that way.
(/sarcasm, of course)