Why do clothes wrinkle?

Hmm, well the title says it all. What makes clothes wrinkle? With some clothes, even if I grab them straight out of the dryer and smooth them out, they still develop wrinkles. Downy Wrinkle Releaser removes the small wrinkles, but stretches out my shirts and leaves the big ones behind. I hate ironing with a passion. I’m rambling now, so I’ll just shut up.

You have to go back all of three days to find a thread (no pun intened) on this subject: http://boards.straightdope.com/sdmb/showthread.php?threadid=70674

Okay, so I’m an idiot (yes, I did a search; I must have missspellled it. But your post does not address the magic of Downy Wrinkle Releaser…