When jizz dries on one's dick tip from beating off the night before. When they wake up the next morning and try to piss, it comes out in two directions like a viper and showers the walls and floors.

When you eat dirt for the first time and leave your family to build a shack in the woods

After sex, cum dries in the end of a man's schlong. When he tries to pee, it comes out in two streams like a viper's tongue. It usually happens after a night of drinking.