The lust is manifested even with the opposition of the will.
Behavior would not be the subject of moral evaluation, but the intellectual conscience can form a moral obligation, accepting the reasons and fixing them in provisions to acquire a spontaneous behavior, which the man of good will trusts in, to follow the true moral good.
Subordinated to truth, humility opens to the supreme vision; such habitus must dress the body in the face of happiness, so that it is not replaced with voluptuousness, which avoids the possibility and the need for love. In respect of natural laws, chastity respects the body and its dynamism, obtaining expressive fullness in service to good.
Only a true love can absorb any shame; to prevent frustration and renunciation, the control of lust conquers both conscience and will.
Neither the imperative nor the practical reason, given by the will, explain the determination of moral duty, which opens up the dignity of perceiving the truth about the good and right values that motivate to act in order to realize them.