runfuckthink
OK, so if you want your brain to improve its 'smartness', here's what you do.
First you go for a 5km run. If you can run longer that's better. Then when you get home, find your partner and engage in some vigorous horizontal activity. After that, have a shower, and then do something mentally stimulating like read an interesting book, or do a cryptic crossword, or some maths, or listen to Mozart. And you will be smarter.
Why? How?
The physical activity and the sex encourages the growth of new brain cells, and then by doing something mentally challenging (thus receiving sensory input) you prevent some of those cells from dying off. And so by running, fucking and thinking you've rewired your brain a little bit. The other bonus is that the production of new brain cells may also have an anti-depressant effect.
You can read about it in much greater detail on the
ABC Radio National Science Show website...