http://www.usatoday.com/tech/columnist/aprilholladay/2004-10-14-wonderquest_x.htm
Scroll down a little to the question
Maybe possible, but I never saw it.
We always sent them for a paternity test, and the news was always bad.
In fact, there was a form to fill out with check marks to see who got the free paternity test — “admitted infidelity,” and “blue/blue/brown” were two of the boxes.