It's one of the most liberating things I experience in writing - letting yourself get rid of a gesture or character or plot point that always nagged, even if you couldn't admit to yourself that it did.
Intellectual property is an important legal and cultural issue. Society as a whole has complex issues to face here: private ownership vs. open source, and so on.
Scientists have found the gene for shyness. They would have found it years ago, but it was hiding behind a couple of other genes.

