For all of us we didn’t know there was a choice, we were all infants at the time the choice was made. We were still figuring out which amorphous blob gives us the milk.

This is why others decide on sex for us through observation. That much is sensible enough, infants are not great at that kind of thing. But we’re discovering more and more that this is an imperfect system and that more often than we realized the answer is not straight forward or in fact that our conclusions are sometimes incorrect even when it appears straight forward.