Its official - Medieval Cambridge Monks gave themselves worms by eating their own poo! Yuck!

Archaeologists have discovered that the friars of medieval Cambridge were twice as likely as the rest of the townsfolk to be riddled with worms, despite being the only people who had access to proper sanitation and handwashing. And why? Because they spread their own poop on their vegetable gardens to help the plants grow - EEEUURGH!!

Medieval Cambridge monks were riddled with worms, study finds - BBC News