Heart Consumption in Norse Mythology

There are tales of men eating the bloody hearts of slain dragons to gain their strength and courage. This is a motif that we see continued in other European myths as well, such as that of the Germanic hero Sigurd who consumes the heart of the dragon Fafnir after slaying the monster. In doing so, he burns his hand on those delicious blood juices of the heart, and he instinctively licks his hand because he's been burned. The taste of the dragon's blood is said to give him the ability to understand all languages.