Warning: Sharp Pain Ahead. This sign should be hung outside Adult Mart, an XXX store with locations around Cleveland. Adult Mart specializes in dildos you need a gym bag to carry. One phallus in particular, called "The Great American Challenge," is heavy-duty enough to dig the Euclid Corridor. Yet the sales clerk claims she sells out of the novelties, and she's even got a video so you can see them in action. But don't be afraid: Adult Mart has toys in all sizes, as well as an impressive collection of DVDs and magazines to satisfy even the most bizarre kinks. Happy spelunking!