[JetSetWilly]

Shyness is estimated to be a 40%-60% heritable trait. If it was an inherent massive disadvantage that women abhorred as you seem to suggest, then shy men simply would swiftly cease to exist.

Yet they do exist, which suggests that actually it isn't some huge disadvantage, or that it has compensating advantages.

[d33]

You forgot one factor - you don't have to directly participate in reproduction to have your genes passed through. Otherwise, homosexuals would cease to exist as well. It's a bit more complex than that.

[dagenleg]

Hey, but what about shy women? If you include them into your calculations then your theory breaks down.