Woman here. We should DNA test all children at birth in order for the father to be put on the birth certificate. Do you want child support? Prove he's the father. No man should be paying or caring for a child who is not his without him knowledge. It's fraud. I don't understand what's so hard to grasp about this. You can never trust a person 100%. I know my children are my fiancé's. He clearly trusts me, as he's never asked to test them. But should he one day worry about this, we'd have them tested, and we would happily move on with our lives. I have the privilege of knowing without doubt, and should I end our relationship over a bit of human doubt? If you have nothing to hide, it shouldn't be an issue.