The brain's calculations do not require our conscious effort, only our attention and our openness to let the information through. Although the brain absorbs universes of information, little is admitted into normal consciousness.
“I would snack on crisps and chocolate and my meals weren't the best. I ate lots of steak with creamy sauces, chips and peas, washed down with wine and a pudding.”
“A lover always thinks of his mistress first and himself second; with a husband it runs the other way.”