Here is a tale, a true tale mind, of a man that I know of..
He was a very rich man back in Pakistan. He worked for the government. Earned money from haram sources, was respected wherever he went. He was treated like royalty. He was rich, he had the life all materialistic people desire.. then..
He was shown the light of Islam and this changed his life for good. He gave up his government job and life of luxury including the haram wealth he had earned from bribes etc for the sake of Allah (swt). He adopted a simple home and a simple lifestyle.
Once someone I know was speaking to him and during the conversation he said..'my wife is the most beautiful person in the world!'.. upon hearing this he was asked why he was saying this and why now, especially since he'd been married for over fifteen years. The man exclaimed.. 'Before, in my days of jahilliyah I used to see other women and I used to think they were attractive. Now I never look at another woman(The man is very strict in lowering his gaze) and suddenly my wife has become so beautiful in my eyes, I see noone else but her..'
Imagine how their relationship flourished after this changed?? subhan'Allah there is so much wisdom in the laws of Allah (swt). If a man controls his eyes and protects his glares from other women, whether that be in real life, on billbords or on TV, what a positive effect it will have on his attitude and in his relationship with his wife.
A good man will always lower his gaze.