"For such an high priest became us, who is holy, harmless, UNDEFILED, SEPARATE from sinners, and made higher than the heavens." Heb. 7:26
Jesus obviously met with sinners and talked with them, yet he was undefiled and "separate" from them.
When I'm around people who curse and swear and do "dirty" things and use dirty language and dress disgustingly, I FEEL defiled. But not as much so if I am positively there to talk to them and help them towards the Savior. I wonder if that's how we KEEP ourselves from being defiled in such a situation? So is this why most movies are totally DEFILING? Because we would be "communing" with the sinners in the movie, yet there is no way to make a positive influence/witness for the Savior in such a situation.