Business ideas that changed the world: to prevent embarrassing repetitions of Popess Joan's sneaky imposture as Pope John VIII in 855, all ambitious clergy are strongly advised to get a Pont-o-genita-check-a-matic (featured above). The pontiff-elect is simply required to sit underwearless on any horseshoe-shaped seat while a junior deacon slides under the chair on this easy-to-use, fuss-free unit. Upon verification that the would-be Pope is indeed male he shouts either "testiculos habet!" or "It'll be ready on Friday".