Both young and old men and women have to take care and abide by good customs or habits (virtues) to avoid the occasion of sin.
It's a part of this life on earth that has to be taken care of.
It's really too bad people have forgotten so much of how good Christian society is formed and people used to live.
Our Lady speaking to Ven. Mary of Agreda told her:
'Thou shouldst not touch, nor look upon, nor speak to any person of whatever condition, whether man or woman, so as to let their images or resemblances find entrance into thy imagination.
This carefulness, which I enjoin, will be the guard of the purity, which I require of thee. If on account of charity or obedience thou must converse with them ( for only these virtues are sufficient causes for conversing with creatures), do it with all gravity, modesty and reserve.'
And the imagination is a faculty, or part of the mind that is most vulnerable to the influence of the demons.
They can quell desire, to lull a person into carelessness, and stir up, when they see the carelessness and inattention is full.
This is why virtuous living must become a way of life and not a burden, or something extra.
Supernatural graces from prayers and living a supernatural life are what are needed to overcome the natural. Nothing less suffices to overcome the natural flaws people have acquired due to original sin.
'Since their eternal happiness, consisting in the vision of God, exceeds the common state of nature, and especially in so far as this is deprived of grace through the corruption of original sin, those who are saved are in the minority. In this especially, however, appears the mercy of God, that He has chosen some for that salvation, from which very many in accordance with the common course and tendency of nature fall short.'
St. Thomas Aquinas