The work of document forgers is not entirely big-ticket certificates like college diplomas and professional licenses; you can also pick up official-looking counterfeits of nonexistent documents. Maybe with a "License to Cruise" you won't get slapped quite so hard in response to your propositions.

Chongqing Evening News reports that vendors have taken this idea for use as a marketing promotion. Pictured is a "Certified Virgin" cigarette case. The text reads:

The smoker who possesses this license is a fully-certified virgin. He is upright and disease-free. All women may use him with worry-free. Valid for 1314 years. Issued by the United Association of International Beauties.

Link: Chongqing Evening News article [Chinese]