I don't know about this northern European thing. Not saying it's wrong, but the Masai drink a lot of cow's milk. Maybe the trick is they mix it with blood.
Spent three weeks with a missionary in Kenya a number of years ago. He had worked with the Masai in the villages. His version of the story was milk + blood + cow urine. Then let it ferment. He claimed the hardest part of drinking it was getting past the smell...
