Surely this can't be true of UK festivals too - can it? a nurse in Colorado claims that Grand Rapids' festival leaves behind much more than churned mud and empty cider cans:
Scott says on average the health clinic sees between 25 and 30 pregnancies a month. She says five weeks after the festival that number jumps to almost 80 a month.
At long last, then, there's the answer to stopping unwanted pregnancies: just hide the country musicians' guitars.