A willingness to do so...

"The Greek word for submission, hupotasso, means to place oneself under the authority of another. This does not involve coercion but rather a willingness to take who and what God made you and submit it to the authority of another: in a man’s case, to God; in a woman’s case, to God and to her husband. It is the lack of submission by a man that generally leads to the lack of submission by a woman."

~ Dr Tony Evans