The plastic contraption fits into the sexual partner's mouth like a normal tooth-protecting device provided by orthodontists.
California, Massachusetts and Nevada voted to legalize the recreational use of marijuana, giving a huge boost to the campaign to allow pot nationwide.
Maine's votes, though still being counted on Wednesday morning, were close but looking most likely in favor of legalization.
And it's not just foods that can be detrimental to your waistline, with a single vodka and Red Bull (112 calories) requiring 25 minutes of weightlifting and a pint of beer (250 calories) taking around 20 minutes of climbing to burn off.
A retainer has been invented to give men extra pleasure during fellatio.
A doctor in China has successfully grown an artificial ear on a man's arm in a pioneering medical procedure (pictured).
The patient, surnamed Ji, lost his right ear in an accident and yearned to have it back.