Did you ever stop to wonder why our nostrils are the perfect size to fit our fingers inside?
After you're done pondering that, consider the convenient shelf that is your ear. Did we have the foresight to design pencils to rest there? Are they such a biologically terrific trait that only those with 'ear-shelves' survived (or the non-earshelf-endowed were deemed undesirable to reproduce with)? Did God create our ears understanding the great utility of having a handy place to put slender writing utensils during a busy day at the office?
And why don't we have built-in pockets?