I will not look with approval on anything that is vile. I hate what faithless people do; I will have no part in it. ~ Psalm 101:3
A life of purity must come with a desire to hate what is evil. However, be careful not to hate yourself if you fall prey to the temptation of lust. That is a trap - you are NOT evil!
Instead, think about how you feel about what is happening in front of your eyes. Do you hate it or love it?
Conquering lust or winning a porn problem is much more difficult than just "deciding" to hate something.
When our heart changes and behavior changees that we learn how to hate what is evil.
Have you struggled with lust? What has been your victory?