Funny, I never would have guessed that

From the Daily Mail:

Women talk three times as much as men, says study

...women talk almost three times as much as men, with the average woman chalking up 20,000 words in a day - 13,000 more than the average man.
...
And, if that wasn't enough, the simple act of talking triggers a flood of brain chemicals which give women a rush similar to that felt by heroin addicts when they get a high.
...
...the brain's "sex processor" - the areas responsible for sexual thoughts - is twice as big as in men than in women, perhaps explaining why men are stereotyped as having sex on the mind.