About a year ago Sebastian Kempa, a freelance photographer who lives near Dortmund, Germany, embarked on a project to show how clothes “are our second layer of skin,” reports The New York Times. “They disguise, reveal, mirror our innermost being or help to hide it,” Mr. Kempa says on his Web site. Mr. Kempa has photographed dozens of people with and without their clothing, and is showing the “before” and “after” results on the site, www.naked-people.de. The site is not pornographic, at least not by the standards of Germany, where it is considered prudish to wear a towel to a unisex sauna. The models are all ordinary people; the pictures are anything but arousing. So Mr. Kempa was surprised that when he tried to create an iPhone application for the online exhibition, it was rejected by Apple.