What do you know about pores? They're, uh, those little holes in my skin, right? Where the pimples live? OK, sure. What else? Nervous silence (as sweat trickles out of your pores.) Relax. Here's the important stuff--from how your pores' size affects complexion, to how you can keep them clear--with expert advice from doctor James Collyer of Modern Dermatology in Seattle.