The confusion comes from the word "helpmeet", we assume it means assistant but it means so much more. The bone was taken from his side, not his foot. I believe this is symbolic for partner. The general characteristics of a man and a woman are complimentary. Another point to consider is that the further the creation process went the more "advanced" the creations were; man was the final act of creation but woman was the last creation and the crowning glory of God's creations.