SAN FRANCISCO - The 25 students in jeans and T-shirts could have been in any career that requires hustle. The classes, covering topics such as effective marketing, stress reduction and legal issues, could have been part of any professional development seminar. But this was "Whore College," and any illusion it was just another corporate how-to for young go-getters abruptly ended at the sex toy display and was stripped away for good during a graphic demonstration that put a whole new twist on the concept of hands-on training. "We are still illegal," instructor Kimberlee Cline said before her 20-minute demonstration. "If...