Rather than wedding rings, medieval brides and grooms bedecked each other's fingers with donuts, as frosting was thought to symbolize prosperity and sprinkles were thought to ward off plague. Engage in edible infatuation with today's Groupon: for $10, you get one dozen donuts at Psycho Donuts (up to a $21 value). This deal is valid only at Psycho Donuts' Second Street location in San Jose.

Psycho Donuts serves up a bevy of unique donut creations outfitted with everything from freeze-dried fruit to zany faces. The Dead Elvis donut shakes its banana, bacon, and PB&J–filled hips in a delectable salute to Elvis Presley, the man who invented brunch. The cereal killer donut slays breakfast appetites with its coating of Cap'n Crunchberries, and the Psycho Passionata's combination of white chocolate, passion fruit, and raspberry icing plucks at heartstrings and beguiles naïve molars. Vegan o' da week and cocktail donuts change weekly and monthly, respectively, to bring in new flavors and keep taste buds on their toes.

Psycho Donuts' crave-inducing confections are dished out by employees in medical uniforms amid an eye-catching interior featuring paintings of cartoon donuts and sinister-looking nurses. Psycho Donuts offers its customers two hours of validated parking, allowing autos to rest without fear of persecution by tow trucks or nagging by sanctimonious parking meters. Groupon purchasers can call ahead with their order for faster service.