If a woman lies and says she is on birth control and a man gets her pregnant (not a teenager), should he have known better and taken precautions anyway? Or is it all the woman's fault for tricking him? What do you think?
Are we talking about placing moral blame or shifting responsibility for costs, e.g. using this as a basis for denying child support? If the latter, I would say that we should continue to place responsibility on the man because otherwise it would make every effort to get child support far more difficult than it needs to be.
I would say something about the man being the least cost avoider, but I can't think of how that would work at the moment.