Commonsense should answer your question. Child support laws say that a CHILD IS ENTITLED to be supported by both parents. Any woman is responsible for the child, if she failed to insure that she did not get pregnant. If a man participates, and does not want a pregnancy to occur, then he ALSO failed to prevent the pregnancy. I will leave out any debates about abortions, except to say that many women do believe that an abortion is morally wrong, and not something they will ever do, even if they did not intend to get pregnant. The bottom line to my thinking is that, once a child is conceived/ born.. there is no longer an issue of what either the father OR mother "want". I personally don't accept the argument that a mom "tricked" a father into a pregnancy.. in this day and age, a man who absolutely does not want a child, has the option to either use his own protection, or get a vasectomy. If he does neither one.. then he has placed himself at risk, just as much as the woman who may not have used birth control. Taking your credit card analogy.. if you are dumb enough to GIVE the card to a person, and they run it up..you still are partly responsible. If you don't want a person to run up a bill on it, keep it locked up. Not trying to be hostile to you here. If I were a judge, and hearing a man whine that he didn't want a child, thus, should not pay, I would triple his child support order.