As a father of 1 boy and 2 girls I feel qualified to state the obvious:
Boys and Girls are Different.
It has not always been fashionable to make this assertion. In the world of "Political Correctness Gone Mad" - the risk of saying that boys and girls are just plain different was a frankly dangerous thing to do. But then, that was to avoid the obvious conclusion that boys and girls are, indeed, different.
Here are my 5 reasons for stating the obvious.