In the wild dogs live in a den which provides protection and a great deal of psychological comfort. (all-about-puppies.com)
With the exception of predatory behaviors that take advantage of the vulnerable among us, we should concentrate on cleaning up our own act, rather than remaking others into our own image so that their presence is not challenge our narcissistic psychological comfort zones. (nakedpastor.com)
Claws provide psychological comfort through kneading, help the cat climb to safety or a secure vantage point, and help the cat fully stretch his back and legs. (littlebigcat.com)