Um I was listening to a show on V103 and this guy thought that only one of the twins wasn't his, so they only wanted to test one. The talk show hists were all laughing at him because he only wanted to test one, like the he already knew the other one WAS his, but this one wasn't. Turned out that the baby wasn't his, but they only tested one, so they assumed that the other one wasn't either. He should have tested both since you obviously never know!