the hypothetical has a possibility of happening that a dude has a chick give him urine so he can hide it and use it for his UA. They could find out that she's pregnant when she didn't kow it herself. And why all the discussion about the best way to cheat a drug test. Read Passing Drug Tests by Kenn A Biscranium and find out how to rapidly and healthfully detox for any random UA. It was written by a guy who smoked weed constantly while on parole and what he did to pass ALL of his random UA's :thumbsup: It was cowritten with a doctor of chemistry; it is absolutely accurate and very informative. And the Boulder Weekly said the book is "hilarious". Read it and pass all your drug tests from now on.