betamale:You are, without a doubt right. To expand on that, a fresh pot of coffee percolating in the next room tops it off for me.
Sack the coffee a good red in hand enhances the sound no end,
In all seriousness The less stimulation your brain has to cope with the more it can focus on the task at hand. That's why lots of people bite their tongue when thinking hard. Brain doesn't have to compute what the tongue (full of nerve endings) is doing.